/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:44:34,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:44:34,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:44:35,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:44:35,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:44:35,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:44:35,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:44:35,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:44:35,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:44:35,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:44:35,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:44:35,068 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:44:35,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:44:35,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:44:35,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:44:35,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:44:35,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:44:35,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:44:35,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:44:35,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:44:35,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:44:35,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:44:35,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:44:35,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:44:35,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:44:35,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:44:35,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:44:35,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:44:35,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:44:35,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:44:35,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:44:35,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:44:35,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:44:35,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:44:35,072 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:44:35,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:44:35,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:44:35,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:44:35,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:44:35,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:44:35,431 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:44:35,434 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:44:35,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl [2021-06-05 04:44:35,435 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl' [2021-06-05 04:44:35,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:44:35,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:44:35,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:44:35,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:44:35,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:44:35,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:44:35,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:44:35,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:44:35,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:44:35,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 04:44:35,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:44:35,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:44:35,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:44:35,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:44:35,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:44:35,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:44:35,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:44:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:44:35,595 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:44:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:44:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:44:35,595 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:44:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:44:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:44:35,596 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:44:35,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:44:35,997 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:44:35,999 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:35 BoogieIcfgContainer [2021-06-05 04:44:35,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:44:36,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:44:36,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:44:36,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:44:36,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/2) ... [2021-06-05 04:44:36,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f30b1a4 and model type nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:44:36, skipping insertion in model container [2021-06-05 04:44:36,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:35" (2/2) ... [2021-06-05 04:44:36,004 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-symm.wvr.bpl [2021-06-05 04:44:36,008 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:44:36,008 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:44:36,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:44:36,009 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:44:36,032 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:44:36,049 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:44:36,068 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:44:36,068 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:44:36,068 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:44:36,068 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:44:36,068 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:44:36,068 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:44:36,068 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:44:36,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:44:36,078 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-06-05 04:44:36,093 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:44:36,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:36,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:36,102 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1169398602, now seen corresponding path program 1 times [2021-06-05 04:44:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554913386] [2021-06-05 04:44:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:36,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554913386] [2021-06-05 04:44:36,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554913386] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:36,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:36,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:44:36,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264713015] [2021-06-05 04:44:36,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:44:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:44:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:36,458 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:36,570 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-06-05 04:44:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:44:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:44:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:36,580 INFO L225 Difference]: With dead ends: 52 [2021-06-05 04:44:36,580 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 04:44:36,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 04:44:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-06-05 04:44:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-06-05 04:44:36,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-06-05 04:44:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:36,618 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-06-05 04:44:36,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-06-05 04:44:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:44:36,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:36,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:36,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:44:36,620 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1342257354, now seen corresponding path program 2 times [2021-06-05 04:44:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:36,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880659749] [2021-06-05 04:44:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:36,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:36,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880659749] [2021-06-05 04:44:36,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880659749] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:36,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:36,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:44:36,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187278346] [2021-06-05 04:44:36,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:44:36,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:44:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:36,900 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:36,973 INFO L93 Difference]: Finished difference Result 48 states and 88 transitions. [2021-06-05 04:44:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:44:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:44:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:36,975 INFO L225 Difference]: With dead ends: 48 [2021-06-05 04:44:36,975 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 04:44:36,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 04:44:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-06-05 04:44:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2021-06-05 04:44:36,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 10 [2021-06-05 04:44:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:36,988 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2021-06-05 04:44:36,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2021-06-05 04:44:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:44:36,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:36,990 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:36,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:44:36,991 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1169517215, now seen corresponding path program 1 times [2021-06-05 04:44:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:36,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106883791] [2021-06-05 04:44:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:37,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106883791] [2021-06-05 04:44:37,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106883791] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:37,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:37,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769968775] [2021-06-05 04:44:37,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:37,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,018 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,023 INFO L93 Difference]: Finished difference Result 35 states and 74 transitions. [2021-06-05 04:44:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:44:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,025 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:44:37,025 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 04:44:37,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 04:44:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-06-05 04:44:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 74 transitions. [2021-06-05 04:44:37,029 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 74 transitions. Word has length 11 [2021-06-05 04:44:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,029 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 74 transitions. [2021-06-05 04:44:37,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 74 transitions. [2021-06-05 04:44:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:44:37,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,030 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:44:37,031 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1198603722, now seen corresponding path program 1 times [2021-06-05 04:44:37,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103812703] [2021-06-05 04:44:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:37,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103812703] [2021-06-05 04:44:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103812703] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:37,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:37,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738858408] [2021-06-05 04:44:37,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,046 INFO L87 Difference]: Start difference. First operand 35 states and 74 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,052 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-06-05 04:44:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:44:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,054 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:44:37,054 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 04:44:37,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 04:44:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-06-05 04:44:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-06-05 04:44:37,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 11 [2021-06-05 04:44:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,057 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-06-05 04:44:37,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-06-05 04:44:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:44:37,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,058 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:44:37,058 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1658290196, now seen corresponding path program 1 times [2021-06-05 04:44:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213632889] [2021-06-05 04:44:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:37,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213632889] [2021-06-05 04:44:37,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213632889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:37,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:37,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:37,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966208388] [2021-06-05 04:44:37,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,080 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,083 INFO L93 Difference]: Finished difference Result 35 states and 64 transitions. [2021-06-05 04:44:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:44:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,084 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:44:37,084 INFO L226 Difference]: Without dead ends: 33 [2021-06-05 04:44:37,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-05 04:44:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-06-05 04:44:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 04:44:37,088 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 04:44:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,088 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 04:44:37,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 04:44:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:44:37,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:44:37,089 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1206692648, now seen corresponding path program 1 times [2021-06-05 04:44:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226836894] [2021-06-05 04:44:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226836894] [2021-06-05 04:44:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226836894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:37,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:37,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167880591] [2021-06-05 04:44:37,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:37,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,110 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,120 INFO L93 Difference]: Finished difference Result 39 states and 74 transitions. [2021-06-05 04:44:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:44:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,124 INFO L225 Difference]: With dead ends: 39 [2021-06-05 04:44:37,124 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:44:37,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:44:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 04:44:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 04:44:37,128 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 04:44:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,128 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 04:44:37,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 04:44:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:37,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:44:37,129 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2083951382, now seen corresponding path program 1 times [2021-06-05 04:44:37,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449103284] [2021-06-05 04:44:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:37,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449103284] [2021-06-05 04:44:37,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449103284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850418558] [2021-06-05 04:44:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:37,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850418558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:37,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:44:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629016344] [2021-06-05 04:44:37,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:37,880 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:38,166 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 04:44:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:38,958 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-06-05 04:44:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:44:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:38,959 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:44:38,959 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:44:38,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1164.6ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:44:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-06-05 04:44:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-05 04:44:38,964 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-05 04:44:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:38,964 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-05 04:44:38,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-05 04:44:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:38,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:38,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:39,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 04:44:39,181 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 417341116, now seen corresponding path program 2 times [2021-06-05 04:44:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:39,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91372360] [2021-06-05 04:44:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:39,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91372360] [2021-06-05 04:44:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91372360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:39,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851113750] [2021-06-05 04:44:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:39,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:39,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:39,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:39,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:39,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:39,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:39,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:40,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:40,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:40,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:40,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:40,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:44:40,054 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:44:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851113750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:40,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:44:40,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837117843] [2021-06-05 04:44:40,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:40,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:40,185 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:40,441 INFO L93 Difference]: Finished difference Result 68 states and 130 transitions. [2021-06-05 04:44:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:40,442 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:44:40,442 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 04:44:40,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 04:44:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-06-05 04:44:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-06-05 04:44:40,446 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-06-05 04:44:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:40,446 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-06-05 04:44:40,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-06-05 04:44:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:40,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:40,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:40,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 04:44:40,661 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash -61943560, now seen corresponding path program 3 times [2021-06-05 04:44:40,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:40,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310079425] [2021-06-05 04:44:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:40,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:40,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310079425] [2021-06-05 04:44:40,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310079425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236305824] [2021-06-05 04:44:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:40,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:41,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:41,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:41,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:41,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:41,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:41,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:41,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:41,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:41,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:41,175 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:41,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:41,190 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:41,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:44:41,247 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:44:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:41,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236305824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:41,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:44:41,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744733716] [2021-06-05 04:44:41,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:41,468 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:41,749 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2021-06-05 04:44:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:41,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:41,750 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:44:41,750 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:44:41,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:44:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-06-05 04:44:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2021-06-05 04:44:41,754 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 14 [2021-06-05 04:44:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:41,754 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2021-06-05 04:44:41,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2021-06-05 04:44:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:41,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:41,755 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:41,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 04:44:41,965 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -597173362, now seen corresponding path program 4 times [2021-06-05 04:44:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:41,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169380666] [2021-06-05 04:44:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:42,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169380666] [2021-06-05 04:44:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169380666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167202005] [2021-06-05 04:44:42,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:42,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:42,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:42,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:42,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:42,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:42,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:42,473 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:42,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,572 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:42,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:42,584 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:42,589 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:42,593 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:42,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:42,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:44:42,675 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 04:44:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167202005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:44:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059895563] [2021-06-05 04:44:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:42,885 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:43,029 INFO L93 Difference]: Finished difference Result 67 states and 128 transitions. [2021-06-05 04:44:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:43,030 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:44:43,030 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 04:44:43,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 04:44:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-06-05 04:44:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 04:44:43,034 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 04:44:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:43,034 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 04:44:43,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 04:44:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:43,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:43,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:43,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:43,236 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 682715498, now seen corresponding path program 5 times [2021-06-05 04:44:43,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:43,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300652211] [2021-06-05 04:44:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:43,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:43,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300652211] [2021-06-05 04:44:43,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300652211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:43,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164509530] [2021-06-05 04:44:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:43,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:43,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164509530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:43,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:43,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:44:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351999561] [2021-06-05 04:44:43,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:43,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:43,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:43,750 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:44,083 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-06-05 04:44:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:44,084 INFO L225 Difference]: With dead ends: 72 [2021-06-05 04:44:44,085 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:44:44,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:44:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-06-05 04:44:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 104 transitions. [2021-06-05 04:44:44,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 104 transitions. Word has length 14 [2021-06-05 04:44:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:44,088 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 104 transitions. [2021-06-05 04:44:44,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 104 transitions. [2021-06-05 04:44:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:44,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:44,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:44,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 04:44:44,293 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 203430822, now seen corresponding path program 6 times [2021-06-05 04:44:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768109510] [2021-06-05 04:44:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:44,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768109510] [2021-06-05 04:44:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768109510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133078000] [2021-06-05 04:44:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:44,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:44:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:44,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:44,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:44,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:44,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:44,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:44,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:44,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:44,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:44,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:44,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:44,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:44,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,858 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 04:44:44,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:44:44,861 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:165, output treesize:95 [2021-06-05 04:44:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133078000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:45,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:44:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905294353] [2021-06-05 04:44:45,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:45,051 INFO L87 Difference]: Start difference. First operand 52 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:45,192 INFO L93 Difference]: Finished difference Result 68 states and 134 transitions. [2021-06-05 04:44:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:45,192 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:44:45,193 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:44:45,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:44:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-06-05 04:44:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 04:44:45,196 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 04:44:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:45,196 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 04:44:45,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 04:44:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:45,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,197 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:45,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:45,405 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -331798980, now seen corresponding path program 7 times [2021-06-05 04:44:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:45,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326356038] [2021-06-05 04:44:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:45,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326356038] [2021-06-05 04:44:45,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326356038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961974599] [2021-06-05 04:44:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:44:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:45,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:45,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:45,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:45,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:45,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:45,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:45,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:45,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:45,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:44:45,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:44:45,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:45,942 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:45,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:45,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:44:45,994 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:44:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961974599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:46,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:44:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292240777] [2021-06-05 04:44:46,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:46,204 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,389 INFO L93 Difference]: Finished difference Result 72 states and 138 transitions. [2021-06-05 04:44:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,392 INFO L225 Difference]: With dead ends: 72 [2021-06-05 04:44:46,392 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 04:44:46,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 04:44:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-06-05 04:44:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 04:44:46,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 04:44:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,395 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 04:44:46,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 04:44:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:46,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 04:44:46,609 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1350037930, now seen corresponding path program 8 times [2021-06-05 04:44:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214558694] [2021-06-05 04:44:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214558694] [2021-06-05 04:44:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214558694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835555347] [2021-06-05 04:44:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:46,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:44:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835555347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:47,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:44:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225287000] [2021-06-05 04:44:47,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:47,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:47,043 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,268 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 04:44:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:47,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,269 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:44:47,269 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:44:47,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:44:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-06-05 04:44:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-06-05 04:44:47,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 14 [2021-06-05 04:44:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,273 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-06-05 04:44:47,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-06-05 04:44:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:47,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,274 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 04:44:47,489 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1533970817, now seen corresponding path program 9 times [2021-06-05 04:44:47,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584495834] [2021-06-05 04:44:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584495834] [2021-06-05 04:44:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584495834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318637084] [2021-06-05 04:44:47,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:47,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:47,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318637084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:47,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 04:44:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857810354] [2021-06-05 04:44:47,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:44:47,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:44:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:47,618 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,683 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-06-05 04:44:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,684 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:44:47,684 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:44:47,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:44:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-06-05 04:44:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 04:44:47,700 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 04:44:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 04:44:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 04:44:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:47,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,702 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 04:44:47,903 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 967321681, now seen corresponding path program 10 times [2021-06-05 04:44:47,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531234024] [2021-06-05 04:44:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531234024] [2021-06-05 04:44:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531234024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484240403] [2021-06-05 04:44:47,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:47,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484240403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:44:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791442250] [2021-06-05 04:44:48,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:44:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:44:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:44:48,039 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,084 INFO L93 Difference]: Finished difference Result 78 states and 156 transitions. [2021-06-05 04:44:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,085 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:44:48,085 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:44:48,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:44:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-06-05 04:44:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2021-06-05 04:44:48,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2021-06-05 04:44:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,088 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2021-06-05 04:44:48,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2021-06-05 04:44:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:48,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,089 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,293 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -47192797, now seen corresponding path program 11 times [2021-06-05 04:44:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693293449] [2021-06-05 04:44:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693293449] [2021-06-05 04:44:48,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693293449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325897673] [2021-06-05 04:44:48,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:48,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:48,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:48,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325897673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:44:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005195900] [2021-06-05 04:44:48,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:44:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:44:48,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:44:48,456 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,552 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-05 04:44:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,553 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:44:48,553 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:44:48,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:44:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-06-05 04:44:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2021-06-05 04:44:48,555 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2021-06-05 04:44:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,555 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2021-06-05 04:44:48,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2021-06-05 04:44:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:48,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,556 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 04:44:48,769 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash -15245844, now seen corresponding path program 12 times [2021-06-05 04:44:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852050444] [2021-06-05 04:44:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852050444] [2021-06-05 04:44:48,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852050444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79213667] [2021-06-05 04:44:48,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:48,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79213667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:48,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631512680] [2021-06-05 04:44:48,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:48,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:48,947 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:49,131 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 04:44:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:49,132 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:44:49,133 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:44:49,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:44:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-06-05 04:44:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.078125) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 133 transitions. [2021-06-05 04:44:49,135 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 133 transitions. Word has length 15 [2021-06-05 04:44:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:49,135 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 133 transitions. [2021-06-05 04:44:49,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 133 transitions. [2021-06-05 04:44:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:49,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:49,136 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:49,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 04:44:49,345 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash -494530520, now seen corresponding path program 13 times [2021-06-05 04:44:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:49,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628634046] [2021-06-05 04:44:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:49,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:49,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628634046] [2021-06-05 04:44:49,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628634046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502071446] [2021-06-05 04:44:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:49,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502071446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:49,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:49,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322076448] [2021-06-05 04:44:49,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:49,550 INFO L87 Difference]: Start difference. First operand 65 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:49,631 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 04:44:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:49,633 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:44:49,633 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:44:49,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:44:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-06-05 04:44:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-06-05 04:44:49,635 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-06-05 04:44:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:49,635 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-06-05 04:44:49,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-06-05 04:44:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:49,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:49,636 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 04:44:49,849 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1824775283, now seen corresponding path program 14 times [2021-06-05 04:44:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605216381] [2021-06-05 04:44:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605216381] [2021-06-05 04:44:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605216381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449753634] [2021-06-05 04:44:49,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:49,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449753634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:50,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:44:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242008809] [2021-06-05 04:44:50,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:44:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:44:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:44:50,010 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:50,082 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 04:44:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:50,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:50,083 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:44:50,083 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:44:50,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:44:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-06-05 04:44:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 04:44:50,085 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 04:44:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:50,085 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 04:44:50,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 04:44:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:50,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:50,086 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:50,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:50,301 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1774400641, now seen corresponding path program 15 times [2021-06-05 04:44:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:50,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286092148] [2021-06-05 04:44:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286092148] [2021-06-05 04:44:50,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286092148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741026447] [2021-06-05 04:44:50,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:50,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:50,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741026447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:50,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083942308] [2021-06-05 04:44:50,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:50,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:50,579 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:50,632 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2021-06-05 04:44:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:50,633 INFO L225 Difference]: With dead ends: 76 [2021-06-05 04:44:50,634 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:44:50,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:44:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-06-05 04:44:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 04:44:50,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 04:44:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:50,636 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 04:44:50,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 04:44:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:50,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:50,638 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:50,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 04:44:50,860 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1090194731, now seen corresponding path program 16 times [2021-06-05 04:44:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710305232] [2021-06-05 04:44:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:50,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710305232] [2021-06-05 04:44:50,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710305232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128036360] [2021-06-05 04:44:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:50,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128036360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036773417] [2021-06-05 04:44:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:51,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:51,560 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:51,610 INFO L93 Difference]: Finished difference Result 80 states and 160 transitions. [2021-06-05 04:44:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:51,611 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:44:51,612 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:44:51,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:44:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-06-05 04:44:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:44:51,614 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:44:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:51,614 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:44:51,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:44:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:51,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:51,615 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:51,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:51,829 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1058714454, now seen corresponding path program 17 times [2021-06-05 04:44:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:51,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171199557] [2021-06-05 04:44:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:51,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171199557] [2021-06-05 04:44:51,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171199557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543382701] [2021-06-05 04:44:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:51,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:51,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:51,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543382701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:52,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:44:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199852458] [2021-06-05 04:44:52,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:44:52,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:44:52,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:52,068 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:52,105 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-06-05 04:44:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:52,106 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:44:52,106 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 04:44:52,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 04:44:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-06-05 04:44:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 04:44:52,108 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 04:44:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:52,108 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 04:44:52,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 04:44:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:52,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:52,110 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 04:44:52,325 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2093797499, now seen corresponding path program 18 times [2021-06-05 04:44:52,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:52,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065203120] [2021-06-05 04:44:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:52,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065203120] [2021-06-05 04:44:52,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065203120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797693948] [2021-06-05 04:44:52,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:52,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797693948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:52,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142146898] [2021-06-05 04:44:52,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:52,604 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:52,646 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 04:44:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:52,647 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:44:52,647 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:44:52,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:44:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-06-05 04:44:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 04:44:52,649 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 04:44:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:52,650 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 04:44:52,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 04:44:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:52,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:52,650 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:52,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 04:44:52,872 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1646459776, now seen corresponding path program 19 times [2021-06-05 04:44:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122503257] [2021-06-05 04:44:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122503257] [2021-06-05 04:44:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122503257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9350712] [2021-06-05 04:44:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:53,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:53,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:53,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:53,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:53,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:44:53,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:44:53,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:53,271 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:53,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,325 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:44:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:53,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,351 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:44:53,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:53,352 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:44:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:53,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9350712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:53,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:53,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151459117] [2021-06-05 04:44:53,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:53,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:53,385 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:53,486 INFO L93 Difference]: Finished difference Result 100 states and 189 transitions. [2021-06-05 04:44:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:53,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:53,487 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:44:53,487 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:44:53,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:44:53,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2021-06-05 04:44:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2021-06-05 04:44:53,490 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2021-06-05 04:44:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:53,490 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2021-06-05 04:44:53,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2021-06-05 04:44:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:53,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:53,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:53,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 04:44:53,691 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:53,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1111229974, now seen corresponding path program 20 times [2021-06-05 04:44:53,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:53,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368794751] [2021-06-05 04:44:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:53,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368794751] [2021-06-05 04:44:53,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368794751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245588952] [2021-06-05 04:44:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:53,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:53,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:53,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:53,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:44:53,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:44:53,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,949 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:44:53,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:53,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:53,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,958 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:44:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:53,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245588952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:53,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:53,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935983091] [2021-06-05 04:44:53,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:53,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:53,968 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:53,997 INFO L93 Difference]: Finished difference Result 73 states and 145 transitions. [2021-06-05 04:44:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:53,998 INFO L225 Difference]: With dead ends: 73 [2021-06-05 04:44:53,998 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:44:53,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:44:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 04:44:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2021-06-05 04:44:54,001 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2021-06-05 04:44:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:54,001 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2021-06-05 04:44:54,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2021-06-05 04:44:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:54,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:54,001 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-05 04:44:54,221 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash 746509439, now seen corresponding path program 21 times [2021-06-05 04:44:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967639420] [2021-06-05 04:44:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:54,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967639420] [2021-06-05 04:44:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967639420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048959480] [2021-06-05 04:44:54,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:54,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:54,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048959480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:54,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:54,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68775449] [2021-06-05 04:44:54,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:54,500 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:54,558 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-06-05 04:44:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:54,559 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:44:54,559 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:44:54,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:44:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-06-05 04:44:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 04:44:54,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 04:44:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:54,561 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 04:44:54,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 04:44:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:54,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:54,562 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:54,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 04:44:54,769 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2137729391, now seen corresponding path program 22 times [2021-06-05 04:44:54,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850747827] [2021-06-05 04:44:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850747827] [2021-06-05 04:44:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850747827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521610781] [2021-06-05 04:44:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:54,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:54,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:44:54,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:54,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:54,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:44:54,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,014 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:44:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:55,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:55,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:44:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521610781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:55,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701768958] [2021-06-05 04:44:55,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:55,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:55,031 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:55,068 INFO L93 Difference]: Finished difference Result 68 states and 136 transitions. [2021-06-05 04:44:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:55,069 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:44:55,069 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:44:55,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:44:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-06-05 04:44:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 04:44:55,071 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 04:44:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:55,072 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 04:44:55,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 04:44:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:55,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:55,072 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:55,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,295 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1142723427, now seen corresponding path program 23 times [2021-06-05 04:44:55,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:55,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381256208] [2021-06-05 04:44:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:55,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381256208] [2021-06-05 04:44:55,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381256208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947193314] [2021-06-05 04:44:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947193314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:44:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531239464] [2021-06-05 04:44:55,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:44:55,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:44:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:55,519 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:55,644 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 04:44:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:55,645 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:44:55,645 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:44:55,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:44:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-06-05 04:44:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-06-05 04:44:55,647 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-06-05 04:44:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:55,647 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-06-05 04:44:55,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-06-05 04:44:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:55,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:55,648 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:55,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,862 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1174670380, now seen corresponding path program 24 times [2021-06-05 04:44:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:55,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447778155] [2021-06-05 04:44:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447778155] [2021-06-05 04:44:55,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447778155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333141372] [2021-06-05 04:44:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:56,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333141372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:56,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:56,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632373160] [2021-06-05 04:44:56,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:56,149 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:56,250 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-06-05 04:44:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:56,257 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:44:56,257 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:44:56,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:44:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-06-05 04:44:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2021-06-05 04:44:56,258 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 15 [2021-06-05 04:44:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:56,258 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2021-06-05 04:44:56,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2021-06-05 04:44:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:56,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:56,259 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:56,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:56,459 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:56,460 INFO L82 PathProgramCache]: Analyzing trace with hash 695385704, now seen corresponding path program 25 times [2021-06-05 04:44:56,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:56,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605669654] [2021-06-05 04:44:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:56,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:56,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605669654] [2021-06-05 04:44:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605669654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969248895] [2021-06-05 04:44:56,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:56,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969248895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:56,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:56,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965514301] [2021-06-05 04:44:56,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:56,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:56,698 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:56,750 INFO L93 Difference]: Finished difference Result 69 states and 138 transitions. [2021-06-05 04:44:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:56,751 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:44:56,751 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:44:56,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:44:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-06-05 04:44:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 04:44:56,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 04:44:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:56,753 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 04:44:56,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 04:44:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:56,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:56,754 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:56,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 04:44:56,978 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1280275789, now seen corresponding path program 26 times [2021-06-05 04:44:56,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:56,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171293070] [2021-06-05 04:44:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:57,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171293070] [2021-06-05 04:44:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171293070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77415994] [2021-06-05 04:44:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:57,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:57,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:44:57,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:44:57,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:57,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:57,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,291 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-06-05 04:44:57,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:57,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,320 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:44:57,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:57,321 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:44:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77415994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:57,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879184606] [2021-06-05 04:44:57,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:57,341 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:57,379 INFO L93 Difference]: Finished difference Result 71 states and 140 transitions. [2021-06-05 04:44:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:57,380 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:44:57,380 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:44:57,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:44:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-06-05 04:44:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 04:44:57,382 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 04:44:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:57,382 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 04:44:57,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 04:44:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:57,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:57,382 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:57,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1730468749, now seen corresponding path program 27 times [2021-06-05 04:44:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147923164] [2021-06-05 04:44:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:57,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147923164] [2021-06-05 04:44:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147923164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484453514] [2021-06-05 04:44:57,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:57,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:44:57,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:44:57,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,918 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-06-05 04:44:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:57,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:57,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:44:57,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:44:57,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:58,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:58,000 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:44:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484453514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:58,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137684976] [2021-06-05 04:44:58,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:58,032 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:58,070 INFO L93 Difference]: Finished difference Result 78 states and 147 transitions. [2021-06-05 04:44:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:58,070 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:44:58,070 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:44:58,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:44:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-06-05 04:44:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 04:44:58,074 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 04:44:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:58,074 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 04:44:58,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 04:44:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:58,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:58,075 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:58,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-06-05 04:44:58,275 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1283131026, now seen corresponding path program 28 times [2021-06-05 04:44:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:58,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388093264] [2021-06-05 04:44:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388093264] [2021-06-05 04:44:58,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388093264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225942068] [2021-06-05 04:44:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:58,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225942068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:58,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:58,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382147478] [2021-06-05 04:44:58,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:58,862 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:58,976 INFO L93 Difference]: Finished difference Result 99 states and 187 transitions. [2021-06-05 04:44:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:58,977 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:44:58,977 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:44:58,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:44:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-06-05 04:44:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-06-05 04:44:58,979 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-06-05 04:44:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:58,979 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-06-05 04:44:58,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-06-05 04:44:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:58,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:58,980 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:59,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:59,180 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 747901224, now seen corresponding path program 29 times [2021-06-05 04:44:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:59,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070702358] [2021-06-05 04:44:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:59,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:59,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070702358] [2021-06-05 04:44:59,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070702358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033415352] [2021-06-05 04:44:59,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:59,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033415352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:59,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:44:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443468804] [2021-06-05 04:44:59,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:44:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:44:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:59,384 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:59,502 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 04:44:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:59,503 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:44:59,503 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:44:59,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:44:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 04:44:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 04:44:59,505 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 04:44:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:59,505 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 04:44:59,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 04:44:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:59,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:59,505 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:59,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable830 [2021-06-05 04:44:59,706 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash 383180689, now seen corresponding path program 30 times [2021-06-05 04:44:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:59,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602477583] [2021-06-05 04:44:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:59,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602477583] [2021-06-05 04:44:59,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602477583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710104629] [2021-06-05 04:44:59,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:59,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:59,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:44:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710104629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:00,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:45:00,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236966729] [2021-06-05 04:45:00,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:00,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:00,006 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,126 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2021-06-05 04:45:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:45:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,127 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:45:00,127 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:45:00,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:45:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-06-05 04:45:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:45:00,129 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 04:45:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,129 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:45:00,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:45:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:00,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,130 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:00,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:00,337 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1967161889, now seen corresponding path program 31 times [2021-06-05 04:45:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:00,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941772990] [2021-06-05 04:45:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:00,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941772990] [2021-06-05 04:45:00,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941772990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62333795] [2021-06-05 04:45:00,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62333795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:00,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:45:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559013316] [2021-06-05 04:45:00,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:00,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:00,541 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,612 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-05 04:45:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:45:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,613 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:45:00,613 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:45:00,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:45:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-06-05 04:45:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:45:00,615 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 04:45:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,616 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:45:00,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:45:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:00,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,616 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:00,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 04:45:00,829 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1935214936, now seen corresponding path program 32 times [2021-06-05 04:45:00,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:00,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767451764] [2021-06-05 04:45:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:00,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767451764] [2021-06-05 04:45:00,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767451764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811330041] [2021-06-05 04:45:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:00,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:00,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811330041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:00,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:45:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683265428] [2021-06-05 04:45:00,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:45:00,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:45:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:45:00,953 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:01,020 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-06-05 04:45:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:01,021 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:45:01,021 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:45:01,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:45:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-06-05 04:45:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:45:01,023 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:45:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:01,023 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:45:01,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:45:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:01,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:01,024 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-05 04:45:01,241 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1880467684, now seen corresponding path program 33 times [2021-06-05 04:45:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:01,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280475341] [2021-06-05 04:45:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:01,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280475341] [2021-06-05 04:45:01,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280475341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340804496] [2021-06-05 04:45:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340804496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:45:01,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038943890] [2021-06-05 04:45:01,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:45:01,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:45:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:45:01,389 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:01,480 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-06-05 04:45:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:01,481 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:45:01,481 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:45:01,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:45:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-06-05 04:45:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:45:01,483 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:45:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:45:01,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:45:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:01,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:01,484 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:01,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,693 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash -95193809, now seen corresponding path program 34 times [2021-06-05 04:45:01,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:01,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221949001] [2021-06-05 04:45:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221949001] [2021-06-05 04:45:01,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221949001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268871915] [2021-06-05 04:45:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268871915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:45:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144821389] [2021-06-05 04:45:01,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:01,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:01,864 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:01,994 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 04:45:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:45:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:01,994 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:45:01,994 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:45:01,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:45:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-06-05 04:45:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:45:01,996 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:45:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:01,996 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:45:01,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:45:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:01,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:01,997 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:02,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable897 [2021-06-05 04:45:02,213 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1345237882, now seen corresponding path program 35 times [2021-06-05 04:45:02,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:02,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774869486] [2021-06-05 04:45:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774869486] [2021-06-05 04:45:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774869486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142349399] [2021-06-05 04:45:02,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:02,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:02,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142349399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:02,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:45:02,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855868183] [2021-06-05 04:45:02,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:45:02,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:45:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:45:02,328 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,402 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 04:45:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,403 INFO L225 Difference]: With dead ends: 73 [2021-06-05 04:45:02,403 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:45:02,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:45:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 04:45:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:45:02,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:45:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,405 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:45:02,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:45:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:02,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,406 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:02,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:02,617 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 980517347, now seen corresponding path program 36 times [2021-06-05 04:45:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:02,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521052171] [2021-06-05 04:45:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:02,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521052171] [2021-06-05 04:45:02,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521052171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312716733] [2021-06-05 04:45:02,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:02,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312716733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:02,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:45:02,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542746991] [2021-06-05 04:45:02,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:02,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:02,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:02,807 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,878 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-06-05 04:45:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:45:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,878 INFO L225 Difference]: With dead ends: 79 [2021-06-05 04:45:02,879 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:45:02,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:45:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-06-05 04:45:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 04:45:02,881 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 04:45:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,881 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 04:45:02,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 04:45:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:02,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,881 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:03,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,085 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1267892504, now seen corresponding path program 37 times [2021-06-05 04:45:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741852774] [2021-06-05 04:45:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741852774] [2021-06-05 04:45:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741852774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299222476] [2021-06-05 04:45:03,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299222476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 04:45:03,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161167117] [2021-06-05 04:45:03,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:45:03,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:45:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:45:03,208 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:03,273 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 04:45:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:03,274 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:45:03,274 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:45:03,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:45:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 04:45:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 04:45:03,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 04:45:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 04:45:03,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 04:45:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:45:03,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:03,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:03,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 04:45:03,477 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1061916403, now seen corresponding path program 38 times [2021-06-05 04:45:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983487413] [2021-06-05 04:45:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983487413] [2021-06-05 04:45:03,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983487413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362704840] [2021-06-05 04:45:03,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:03,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:03,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362704840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:45:03,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620322775] [2021-06-05 04:45:03,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:45:03,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:45:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:45:03,623 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:03,709 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 04:45:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:45:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:45:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:03,709 INFO L225 Difference]: With dead ends: 58 [2021-06-05 04:45:03,710 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 04:45:03,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 04:45:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 04:45:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 04:45:03,711 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 04:45:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:03,711 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 04:45:03,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 04:45:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:03,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:03,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:03,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,912 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1145172877, now seen corresponding path program 39 times [2021-06-05 04:45:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076916451] [2021-06-05 04:45:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:04,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076916451] [2021-06-05 04:45:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076916451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727255881] [2021-06-05 04:45:04,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:04,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:04,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:04,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:04,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:04,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:04,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,913 INFO L628 ElimStorePlain]: treesize reduction 91, result has 36.8 percent of original size [2021-06-05 04:45:04,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:04,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:04,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:04,940 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:222, output treesize:49 [2021-06-05 04:45:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:05,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727255881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:05,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:45:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845895602] [2021-06-05 04:45:05,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:05,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:05,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:05,028 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,286 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 04:45:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:05,605 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-05 04:45:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:05,606 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:45:05,606 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:45:05,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:45:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-06-05 04:45:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 129 transitions. [2021-06-05 04:45:05,608 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 129 transitions. Word has length 16 [2021-06-05 04:45:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:05,608 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 129 transitions. [2021-06-05 04:45:05,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 129 transitions. [2021-06-05 04:45:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:05,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:05,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:05,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 04:45:05,831 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -914516767, now seen corresponding path program 40 times [2021-06-05 04:45:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:05,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527689859] [2021-06-05 04:45:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:06,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527689859] [2021-06-05 04:45:06,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527689859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778192487] [2021-06-05 04:45:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:06,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:06,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:06,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:06,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:06,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:06,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:06,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:06,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:06,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:06,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:06,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:06,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:06,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:06,870 INFO L628 ElimStorePlain]: treesize reduction 91, result has 36.8 percent of original size [2021-06-05 04:45:06,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:06,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:06,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:06,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:06,890 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:222, output treesize:49 [2021-06-05 04:45:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:06,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778192487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:06,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:06,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17875326] [2021-06-05 04:45:06,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:06,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:06,956 INFO L87 Difference]: Start difference. First operand 65 states and 129 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:07,246 INFO L93 Difference]: Finished difference Result 96 states and 188 transitions. [2021-06-05 04:45:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:07,247 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:45:07,247 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:45:07,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:45:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2021-06-05 04:45:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 134 transitions. [2021-06-05 04:45:07,249 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 134 transitions. Word has length 16 [2021-06-05 04:45:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:07,249 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 134 transitions. [2021-06-05 04:45:07,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 134 transitions. [2021-06-05 04:45:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:07,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:07,250 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:07,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:07,465 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1407527461, now seen corresponding path program 41 times [2021-06-05 04:45:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748733410] [2021-06-05 04:45:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:07,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748733410] [2021-06-05 04:45:07,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748733410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472987946] [2021-06-05 04:45:07,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:07,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:45:07,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:08,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:08,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:08,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:08,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,307 INFO L628 ElimStorePlain]: treesize reduction 104, result has 37.3 percent of original size [2021-06-05 04:45:08,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:08,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:08,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:08,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:08,367 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:08,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:08,389 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:45:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472987946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:08,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079918273] [2021-06-05 04:45:08,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:08,474 INFO L87 Difference]: Start difference. First operand 67 states and 134 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,827 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 04:45:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:08,930 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 04:45:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:08,931 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:45:08,931 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:45:08,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:45:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-06-05 04:45:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 04:45:08,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 04:45:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:08,933 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 04:45:08,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 04:45:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:08,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:08,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:09,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 04:45:09,134 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash 928242785, now seen corresponding path program 42 times [2021-06-05 04:45:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:09,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991438048] [2021-06-05 04:45:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:09,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:09,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991438048] [2021-06-05 04:45:09,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991438048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278334841] [2021-06-05 04:45:09,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:09,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:09,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:10,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:45:10,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:10,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:10,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:10,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:10,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:10,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,712 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 04:45:10,712 INFO L628 ElimStorePlain]: treesize reduction 557, result has 17.5 percent of original size [2021-06-05 04:45:10,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:10,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:10,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:10,807 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:10,854 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:10,895 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:10,935 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:10,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:10,983 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:11,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:11,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:11,022 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 10 variables, input treesize:901, output treesize:73 [2021-06-05 04:45:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:11,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278334841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:11,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:11,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480966178] [2021-06-05 04:45:11,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:11,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:11,148 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:11,552 INFO L93 Difference]: Finished difference Result 118 states and 217 transitions. [2021-06-05 04:45:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:11,553 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:45:11,553 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:45:11,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:45:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2021-06-05 04:45:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 69 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2021-06-05 04:45:11,555 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 16 [2021-06-05 04:45:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:11,556 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2021-06-05 04:45:11,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2021-06-05 04:45:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:11,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:11,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 04:45:11,773 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1995272783, now seen corresponding path program 43 times [2021-06-05 04:45:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489424379] [2021-06-05 04:45:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:11,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:11,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489424379] [2021-06-05 04:45:11,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489424379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402106451] [2021-06-05 04:45:11,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:11,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:12,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:12,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:12,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:12,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:12,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:12,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:12,221 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:45:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:12,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402106451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:12,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:12,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007079903] [2021-06-05 04:45:12,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:12,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:12,297 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:12,568 INFO L93 Difference]: Finished difference Result 98 states and 193 transitions. [2021-06-05 04:45:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:12,569 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:45:12,569 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:45:12,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:45:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-06-05 04:45:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2021-06-05 04:45:12,571 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 16 [2021-06-05 04:45:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:12,571 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2021-06-05 04:45:12,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2021-06-05 04:45:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:12,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:12,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:12,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:12,772 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1515988107, now seen corresponding path program 44 times [2021-06-05 04:45:12,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:12,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564216288] [2021-06-05 04:45:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:12,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:12,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564216288] [2021-06-05 04:45:12,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564216288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093298086] [2021-06-05 04:45:12,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:12,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:12,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:13,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:13,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:13,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:13,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:13,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:13,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:13,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:13,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:13,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:13,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:13,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:13,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:13,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:13,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:13,334 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:45:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093298086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:13,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:13,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225287749] [2021-06-05 04:45:13,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:13,504 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:14,010 INFO L93 Difference]: Finished difference Result 134 states and 255 transitions. [2021-06-05 04:45:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:14,011 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:45:14,011 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:45:14,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 690.4ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:45:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 74. [2021-06-05 04:45:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2021-06-05 04:45:14,013 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 16 [2021-06-05 04:45:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:14,014 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 152 transitions. [2021-06-05 04:45:14,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 152 transitions. [2021-06-05 04:45:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:14,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:14,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:14,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:14,221 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 980758305, now seen corresponding path program 45 times [2021-06-05 04:45:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998408689] [2021-06-05 04:45:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998408689] [2021-06-05 04:45:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998408689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662328597] [2021-06-05 04:45:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:14,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:14,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:14,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:14,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:14,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:14,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:14,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:14,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:14,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:14,681 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:14,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:14,728 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:45:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662328597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:14,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48482415] [2021-06-05 04:45:14,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:14,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:14,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:14,889 INFO L87 Difference]: Start difference. First operand 74 states and 152 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:15,524 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 04:45:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:45:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:15,525 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:45:15,525 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:45:15,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:45:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-06-05 04:45:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-06-05 04:45:15,527 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 16 [2021-06-05 04:45:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:15,527 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-06-05 04:45:15,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-06-05 04:45:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:15,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:15,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:15,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:15,751 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash -8562829, now seen corresponding path program 46 times [2021-06-05 04:45:15,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:15,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951303800] [2021-06-05 04:45:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:15,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:15,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951303800] [2021-06-05 04:45:15,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951303800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811926047] [2021-06-05 04:45:15,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:15,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:16,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:16,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:16,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:16,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:16,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:16,822 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,827 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:16,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:16,847 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:16,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:45:16,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:16,867 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,980 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 04:45:16,980 INFO L628 ElimStorePlain]: treesize reduction 19, result has 88.5 percent of original size [2021-06-05 04:45:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:16,984 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:16,988 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:16,991 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:16,995 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:16,998 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:17,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:17,002 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:17,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:17,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:17,045 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:569, output treesize:86 [2021-06-05 04:45:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:17,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811926047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:17,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:17,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014690533] [2021-06-05 04:45:17,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:17,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:17,144 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:17,386 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-06-05 04:45:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:17,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:17,386 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:45:17,386 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:45:17,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 522.9ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:45:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 04:45:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 04:45:17,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 04:45:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:17,388 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 04:45:17,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 04:45:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:17,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:17,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:17,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-06-05 04:45:17,589 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1981485897, now seen corresponding path program 47 times [2021-06-05 04:45:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:17,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395856955] [2021-06-05 04:45:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:17,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395856955] [2021-06-05 04:45:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395856955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401684698] [2021-06-05 04:45:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:17,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:18,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:45:18,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:18,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:45:18,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:18,626 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:18,632 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,635 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:18,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:18,648 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:18,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,702 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:45:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:18,706 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:18,709 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:18,712 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:18,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:18,733 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:45:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401684698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801385913] [2021-06-05 04:45:18,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:18,814 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,093 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 04:45:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:19,175 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-06-05 04:45:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:19,176 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:45:19,176 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:45:19,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:45:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 04:45:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 04:45:19,179 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 04:45:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:19,179 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 04:45:19,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 04:45:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:19,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:19,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:19,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 04:45:19,395 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1834196723, now seen corresponding path program 48 times [2021-06-05 04:45:19,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:19,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61851582] [2021-06-05 04:45:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:19,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:19,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61851582] [2021-06-05 04:45:19,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61851582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:19,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518695395] [2021-06-05 04:45:19,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:19,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:45:20,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:20,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:20,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:20,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,287 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:20,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,302 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,308 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,315 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:20,322 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:20,335 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:20,341 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:20,347 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,455 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 04:45:20,455 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:45:20,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:20,461 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:20,464 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:20,468 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:20,472 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:20,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:20,512 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:45:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:20,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518695395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:20,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:20,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965875918] [2021-06-05 04:45:20,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:20,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:20,638 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:21,039 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 04:45:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:21,040 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:45:21,040 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:45:21,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:45:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 81. [2021-06-05 04:45:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 04:45:21,042 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 04:45:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:21,042 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 04:45:21,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 04:45:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:21,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:21,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:21,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 04:45:21,243 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1393740575, now seen corresponding path program 49 times [2021-06-05 04:45:21,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:21,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585433899] [2021-06-05 04:45:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:21,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585433899] [2021-06-05 04:45:21,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585433899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168636603] [2021-06-05 04:45:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:21,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:21,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:21,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:21,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:21,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:21,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:21,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:21,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:21,721 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:45:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168636603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:21,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982602308] [2021-06-05 04:45:21,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:21,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:21,792 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:21,903 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2021-06-05 04:45:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:21,904 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:45:21,904 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:45:21,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:45:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-06-05 04:45:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 04:45:21,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 04:45:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:21,906 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 04:45:21,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 04:45:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:21,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:21,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:22,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-06-05 04:45:22,117 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1873025251, now seen corresponding path program 50 times [2021-06-05 04:45:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384410622] [2021-06-05 04:45:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:22,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384410622] [2021-06-05 04:45:22,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384410622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355600603] [2021-06-05 04:45:22,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:22,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:22,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:22,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:22,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:22,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,596 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 04:45:22,596 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-06-05 04:45:22,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:22,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:22,620 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:22,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:22,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,720 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 04:45:22,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:22,722 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:192, output treesize:109 [2021-06-05 04:45:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355600603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:22,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:22,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138782944] [2021-06-05 04:45:22,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:22,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:22,898 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:23,158 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 04:45:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:23,159 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:45:23,159 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:45:23,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:45:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2021-06-05 04:45:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 04:45:23,161 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 04:45:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:23,161 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 04:45:23,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 04:45:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:23,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:23,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:23,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:23,362 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1886712243, now seen corresponding path program 51 times [2021-06-05 04:45:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:23,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187540574] [2021-06-05 04:45:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:23,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:23,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187540574] [2021-06-05 04:45:23,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187540574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539505145] [2021-06-05 04:45:23,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:23,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:23,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:23,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:23,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:23,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:23,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:23,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:23,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:23,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:23,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:23,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:23,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:23,855 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:23,858 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:23,862 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:23,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:23,900 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:166, output treesize:79 [2021-06-05 04:45:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539505145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:24,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:24,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094121259] [2021-06-05 04:45:24,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:24,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:24,038 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,569 INFO L93 Difference]: Finished difference Result 141 states and 276 transitions. [2021-06-05 04:45:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:45:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,570 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:45:24,570 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:45:24,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:45:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2021-06-05 04:45:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 04:45:24,572 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 04:45:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,572 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 04:45:24,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 04:45:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:24,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:24,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2223 [2021-06-05 04:45:24,796 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -353504777, now seen corresponding path program 52 times [2021-06-05 04:45:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:24,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863687974] [2021-06-05 04:45:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:24,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863687974] [2021-06-05 04:45:24,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863687974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98890607] [2021-06-05 04:45:24,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:25,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:25,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:25,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:25,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:25,235 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,340 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 04:45:25,341 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 04:45:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:25,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,347 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:25,356 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:25,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:25,364 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,437 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-06-05 04:45:25,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:25,439 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:191, output treesize:83 [2021-06-05 04:45:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98890607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:25,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087903057] [2021-06-05 04:45:25,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:25,536 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:26,105 INFO L93 Difference]: Finished difference Result 115 states and 233 transitions. [2021-06-05 04:45:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:26,105 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:45:26,106 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:45:26,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:45:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-06-05 04:45:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 04:45:26,108 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2021-06-05 04:45:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:26,108 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 04:45:26,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 04:45:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:26,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:26,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:26,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:26,331 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash -832789453, now seen corresponding path program 53 times [2021-06-05 04:45:26,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:26,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144692546] [2021-06-05 04:45:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:26,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144692546] [2021-06-05 04:45:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144692546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757474502] [2021-06-05 04:45:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:26,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:26,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:26,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:26,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:26,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:26,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:26,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:26,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:26,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:26,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,875 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:26,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:26,883 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:26,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:26,942 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 04:45:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757474502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:27,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592771935] [2021-06-05 04:45:27,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:27,108 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:27,400 INFO L93 Difference]: Finished difference Result 117 states and 234 transitions. [2021-06-05 04:45:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:27,401 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:45:27,401 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:45:27,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:45:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-06-05 04:45:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 04:45:27,403 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2021-06-05 04:45:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:27,403 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 04:45:27,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 04:45:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:27,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:27,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:27,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-06-05 04:45:27,626 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1368019255, now seen corresponding path program 54 times [2021-06-05 04:45:27,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:27,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264411242] [2021-06-05 04:45:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:27,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:27,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264411242] [2021-06-05 04:45:27,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264411242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413451051] [2021-06-05 04:45:27,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:27,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:27,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:28,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:28,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:28,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:28,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:28,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:28,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:28,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:28,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:28,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:28,095 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:28,099 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:28,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:28,148 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:45:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413451051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:28,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872949771] [2021-06-05 04:45:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:28,304 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:28,661 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-06-05 04:45:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:28,662 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:45:28,662 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:45:28,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:45:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-06-05 04:45:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-06-05 04:45:28,665 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-06-05 04:45:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:28,665 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-06-05 04:45:28,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-06-05 04:45:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:28,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:28,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:28,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-06-05 04:45:28,866 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash -780273933, now seen corresponding path program 55 times [2021-06-05 04:45:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145133686] [2021-06-05 04:45:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:29,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:29,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145133686] [2021-06-05 04:45:29,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145133686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572274841] [2021-06-05 04:45:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:29,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:29,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:30,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:30,026 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:30,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:30,039 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:45:30,057 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:30,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,068 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:30,075 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,084 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:30,088 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,189 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 04:45:30,190 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:45:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:30,195 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:30,199 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:30,203 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:30,207 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:30,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:30,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:30,251 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:45:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:30,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572274841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:30,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:30,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550531452] [2021-06-05 04:45:30,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:30,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:30,398 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,878 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-06-05 04:45:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:30,950 INFO L93 Difference]: Finished difference Result 125 states and 254 transitions. [2021-06-05 04:45:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:45:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:30,951 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:45:30,951 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:45:30,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 696.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:45:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2021-06-05 04:45:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 04:45:30,958 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 04:45:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:30,958 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 04:45:30,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 04:45:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:30,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:30,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-06-05 04:45:31,173 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1613147809, now seen corresponding path program 56 times [2021-06-05 04:45:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122027528] [2021-06-05 04:45:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:31,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122027528] [2021-06-05 04:45:31,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122027528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150919283] [2021-06-05 04:45:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:31,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:31,677 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2021-06-05 04:45:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:32,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:32,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:32,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:32,421 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:32,434 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:45:32,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,449 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,453 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:32,458 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:32,463 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,470 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:32,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:32,479 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,483 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:32,486 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,591 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 04:45:32,591 INFO L628 ElimStorePlain]: treesize reduction 17, result has 89.7 percent of original size [2021-06-05 04:45:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:32,595 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:32,599 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:32,602 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:32,605 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:32,609 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:32,612 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:32,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:32,655 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 5 variables, input treesize:704, output treesize:86 [2021-06-05 04:45:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:32,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150919283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:32,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:32,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361397204] [2021-06-05 04:45:32,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:32,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:32,749 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:32,988 INFO L93 Difference]: Finished difference Result 121 states and 247 transitions. [2021-06-05 04:45:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:32,989 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:45:32,989 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:45:32,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:45:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2021-06-05 04:45:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 191 transitions. [2021-06-05 04:45:32,991 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 191 transitions. Word has length 16 [2021-06-05 04:45:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:32,991 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 191 transitions. [2021-06-05 04:45:32,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 191 transitions. [2021-06-05 04:45:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:32,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:32,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:33,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2472,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:33,197 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash -359775259, now seen corresponding path program 57 times [2021-06-05 04:45:33,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:33,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603131393] [2021-06-05 04:45:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:33,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603131393] [2021-06-05 04:45:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603131393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123440113] [2021-06-05 04:45:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:34,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:34,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:34,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:34,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:34,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:34,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:34,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,357 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:34,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:45:34,366 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:34,371 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:34,376 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:34,380 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,486 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 04:45:34,486 INFO L628 ElimStorePlain]: treesize reduction 17, result has 89.7 percent of original size [2021-06-05 04:45:34,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:34,490 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:34,494 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:34,499 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:34,503 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:34,508 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:34,512 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:34,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:34,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:34,556 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:569, output treesize:86 [2021-06-05 04:45:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123440113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:34,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962888402] [2021-06-05 04:45:34,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:34,658 INFO L87 Difference]: Start difference. First operand 91 states and 191 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,081 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 04:45:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:35,469 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 04:45:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:35,470 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:45:35,470 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:45:35,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:45:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2021-06-05 04:45:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.131868131868132) internal successors, (194), 91 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 194 transitions. [2021-06-05 04:45:35,472 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 194 transitions. Word has length 16 [2021-06-05 04:45:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 194 transitions. [2021-06-05 04:45:35,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 194 transitions. [2021-06-05 04:45:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:35,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:35,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:35,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2642,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:35,673 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash -839059935, now seen corresponding path program 58 times [2021-06-05 04:45:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:35,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068410164] [2021-06-05 04:45:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:35,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068410164] [2021-06-05 04:45:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068410164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337556888] [2021-06-05 04:45:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:35,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:36,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:36,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:36,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:36,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:45:36,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,853 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:36,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:36,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:36,874 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:36,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:36,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:36,889 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,894 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:36,899 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:36,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:36,905 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,071 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 04:45:37,072 INFO L628 ElimStorePlain]: treesize reduction 17, result has 91.3 percent of original size [2021-06-05 04:45:37,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:37,076 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:37,081 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:37,086 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:37,090 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:37,096 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:37,101 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:37,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:37,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:37,155 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:649, output treesize:112 [2021-06-05 04:45:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337556888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:37,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711948249] [2021-06-05 04:45:37,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:37,336 INFO L87 Difference]: Start difference. First operand 92 states and 194 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:37,589 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-06-05 04:45:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:37,589 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:45:37,589 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:45:37,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:45:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-06-05 04:45:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 04:45:37,591 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 04:45:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:37,592 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 04:45:37,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 04:45:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:37,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:37,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:37,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2809 [2021-06-05 04:45:37,809 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 227970063, now seen corresponding path program 59 times [2021-06-05 04:45:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:37,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718884746] [2021-06-05 04:45:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:37,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718884746] [2021-06-05 04:45:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718884746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948851344] [2021-06-05 04:45:37,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:37,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:38,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:38,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:38,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:38,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:38,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:38,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:38,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:38,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:38,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:38,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:38,270 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:109, output treesize:48 [2021-06-05 04:45:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:38,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948851344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:38,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:38,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390546854] [2021-06-05 04:45:38,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:38,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:38,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:38,338 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:38,499 INFO L93 Difference]: Finished difference Result 108 states and 216 transitions. [2021-06-05 04:45:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:38,500 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:45:38,500 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:45:38,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:45:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-06-05 04:45:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-06-05 04:45:38,502 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 16 [2021-06-05 04:45:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:38,502 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-06-05 04:45:38,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-06-05 04:45:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:38,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:38,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:38,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:38,709 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -251314613, now seen corresponding path program 60 times [2021-06-05 04:45:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:38,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482538667] [2021-06-05 04:45:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:38,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482538667] [2021-06-05 04:45:38,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482538667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261663047] [2021-06-05 04:45:38,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:38,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:38,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:39,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:39,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:39,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:39,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:39,119 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:39,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:39,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:39,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:39,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:39,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:39,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:39,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:39,236 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:45:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:39,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261663047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:39,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:39,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:39,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264554996] [2021-06-05 04:45:39,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:39,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:39,406 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:39,688 INFO L93 Difference]: Finished difference Result 119 states and 242 transitions. [2021-06-05 04:45:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:39,688 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:45:39,688 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:45:39,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:45:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-06-05 04:45:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-06-05 04:45:39,690 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 16 [2021-06-05 04:45:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:39,690 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-06-05 04:45:39,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-06-05 04:45:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:39,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:39,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3007 [2021-06-05 04:45:39,891 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash -786544415, now seen corresponding path program 61 times [2021-06-05 04:45:39,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225892432] [2021-06-05 04:45:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:40,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225892432] [2021-06-05 04:45:40,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225892432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377691110] [2021-06-05 04:45:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:40,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:40,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:40,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:40,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:40,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:40,316 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:40,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:40,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:40,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:40,389 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:40,392 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:40,396 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:40,399 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:40,402 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:40,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:40,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:40,451 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:232, output treesize:96 [2021-06-05 04:45:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:40,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377691110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:40,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605692497] [2021-06-05 04:45:40,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:40,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:40,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:40,622 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:40,954 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-06-05 04:45:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:40,955 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:45:40,955 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:45:40,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:45:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-06-05 04:45:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 04:45:40,957 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 04:45:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:40,957 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 04:45:40,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 04:45:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:40,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:40,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:41,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3040,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:41,165 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:41,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1268205861, now seen corresponding path program 62 times [2021-06-05 04:45:41,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:41,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650510711] [2021-06-05 04:45:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:41,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:41,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650510711] [2021-06-05 04:45:41,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650510711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378498027] [2021-06-05 04:45:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:41,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:41,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:41,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:41,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:41,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:41,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:41,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:41,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,738 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 04:45:41,739 INFO L628 ElimStorePlain]: treesize reduction 30, result has 83.8 percent of original size [2021-06-05 04:45:41,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:41,742 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:41,749 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,753 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,756 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:41,759 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:41,762 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:41,850 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 04:45:41,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 04:45:41,852 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:256, output treesize:101 [2021-06-05 04:45:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:41,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378498027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:41,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283258832] [2021-06-05 04:45:41,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:41,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:41,953 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:42,388 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-06-05 04:45:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:42,388 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:45:42,388 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:45:42,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:45:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2021-06-05 04:45:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 04:45:42,390 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 16 [2021-06-05 04:45:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:42,391 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 04:45:42,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 04:45:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:42,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:42,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:42,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3083 [2021-06-05 04:45:42,601 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 788921185, now seen corresponding path program 63 times [2021-06-05 04:45:42,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:42,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907111412] [2021-06-05 04:45:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:42,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907111412] [2021-06-05 04:45:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907111412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013609723] [2021-06-05 04:45:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:42,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:42,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:42,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:42,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:42,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:42,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:42,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:42,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:42,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:42,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:43,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:43,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:43,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:43,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:43,058 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:43,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:43,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:43,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:45:43,114 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:199, output treesize:100 [2021-06-05 04:45:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013609723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:43,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:43,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988646631] [2021-06-05 04:45:43,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:43,279 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:43,575 INFO L93 Difference]: Finished difference Result 129 states and 262 transitions. [2021-06-05 04:45:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:43,576 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:45:43,576 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:45:43,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:45:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-06-05 04:45:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 04:45:43,578 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-06-05 04:45:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:43,578 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 04:45:43,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 04:45:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:43,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:43,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:43,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:43,793 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash 253691383, now seen corresponding path program 64 times [2021-06-05 04:45:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:43,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854162462] [2021-06-05 04:45:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:43,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854162462] [2021-06-05 04:45:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854162462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048140048] [2021-06-05 04:45:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:43,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:44,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:44,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:44,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:44,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:44,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:44,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:44,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:44,261 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:44,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:44,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:44,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:45:44,325 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 04:45:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:44,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048140048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:44,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:44,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589960144] [2021-06-05 04:45:44,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:44,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:44,489 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:44,780 INFO L93 Difference]: Finished difference Result 129 states and 265 transitions. [2021-06-05 04:45:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:44,781 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:45:44,781 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:45:44,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:45:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-06-05 04:45:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 04:45:44,782 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-06-05 04:45:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:44,783 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 04:45:44,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 04:45:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:44,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:44,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:44,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3140 [2021-06-05 04:45:44,989 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash 841436705, now seen corresponding path program 65 times [2021-06-05 04:45:44,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:44,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336342862] [2021-06-05 04:45:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:45,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:45,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336342862] [2021-06-05 04:45:45,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336342862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464073982] [2021-06-05 04:45:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:45,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:45,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:45,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:45,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:45,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:45,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:45:45,945 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,949 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:45:45,954 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:45,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,963 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:45,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:45,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:45,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:45,972 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:46,065 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:45:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:46,069 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:46,073 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:46,076 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:46,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:46,079 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:46,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:46,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:46,119 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:45:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:46,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464073982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:46,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:45:46,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854019496] [2021-06-05 04:45:46,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:46,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:46,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:46,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:46,246 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:46,576 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-06-05 04:45:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:46,577 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:45:46,577 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:45:46,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:45:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-06-05 04:45:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 04:45:46,579 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 04:45:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:46,579 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 04:45:46,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 04:45:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:46,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:46,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:46,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-05 04:45:46,793 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:46,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1689194221, now seen corresponding path program 66 times [2021-06-05 04:45:46,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:46,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805148223] [2021-06-05 04:45:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:46,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805148223] [2021-06-05 04:45:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805148223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504442708] [2021-06-05 04:45:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:46,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:47,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:47,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:47,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:47,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:47,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:47,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:47,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:47,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:47,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:47,234 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:45:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504442708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:47,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:47,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685806948] [2021-06-05 04:45:47,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:47,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:47,301 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:47,541 INFO L93 Difference]: Finished difference Result 116 states and 232 transitions. [2021-06-05 04:45:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:47,542 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:45:47,542 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:45:47,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:45:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 04:45:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 04:45:47,543 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-06-05 04:45:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:47,543 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 04:45:47,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 04:45:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:47,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:47,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:47,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:47,744 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2126488399, now seen corresponding path program 67 times [2021-06-05 04:45:47,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:47,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255149812] [2021-06-05 04:45:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255149812] [2021-06-05 04:45:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255149812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427441482] [2021-06-05 04:45:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:45:48,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:45:48,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:48,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:45:48,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:48,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,782 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:45:48,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:48,794 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,798 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,801 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:48,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:48,808 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,893 INFO L628 ElimStorePlain]: treesize reduction 16, result has 86.8 percent of original size [2021-06-05 04:45:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:48,897 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:48,900 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:48,903 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:48,907 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:48,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:48,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:48,944 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 3 variables, input treesize:609, output treesize:73 [2021-06-05 04:45:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:49,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427441482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:49,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:49,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683535457] [2021-06-05 04:45:49,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:49,064 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:49,331 INFO L93 Difference]: Finished difference Result 143 states and 278 transitions. [2021-06-05 04:45:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:49,332 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:45:49,332 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:45:49,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:45:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-06-05 04:45:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 04:45:49,334 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 04:45:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:49,334 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 04:45:49,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 04:45:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:49,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:49,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:49,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:49,549 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1591258597, now seen corresponding path program 68 times [2021-06-05 04:45:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:49,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496623931] [2021-06-05 04:45:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:49,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496623931] [2021-06-05 04:45:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496623931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:49,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336559444] [2021-06-05 04:45:49,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:49,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:45:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:49,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:49,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:49,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:49,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:49,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:49,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:49,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:49,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:49,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:49,982 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:50,045 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:45:50,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:50,046 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:130, output treesize:73 [2021-06-05 04:45:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336559444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:50,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:45:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101574282] [2021-06-05 04:45:50,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:50,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:50,185 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:50,517 INFO L93 Difference]: Finished difference Result 118 states and 242 transitions. [2021-06-05 04:45:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:50,518 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:45:50,518 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:45:50,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:45:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 04:45:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 04:45:50,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-06-05 04:45:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:50,519 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 04:45:50,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 04:45:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:50,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:50,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:50,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:50,720 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2115963377, now seen corresponding path program 69 times [2021-06-05 04:45:50,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:50,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194076896] [2021-06-05 04:45:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:50,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:50,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194076896] [2021-06-05 04:45:50,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194076896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949030220] [2021-06-05 04:45:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:50,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:50,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:51,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:51,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:51,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:51,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:45:51,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:51,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,005 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 04:45:52,005 INFO L628 ElimStorePlain]: treesize reduction 474, result has 19.5 percent of original size [2021-06-05 04:45:52,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:52,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:45:52,114 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:52,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:52,199 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,275 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:52,309 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 04:45:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949030220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:52,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:52,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:45:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847261609] [2021-06-05 04:45:52,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:52,429 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:52,766 INFO L93 Difference]: Finished difference Result 134 states and 275 transitions. [2021-06-05 04:45:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:52,767 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:45:52,767 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:45:52,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:45:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 04:45:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 04:45:52,769 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-06-05 04:45:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:52,769 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 04:45:52,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 04:45:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:45:52,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:52,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:52,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:52,992 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1518626719, now seen corresponding path program 70 times [2021-06-05 04:45:52,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:52,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787447834] [2021-06-05 04:45:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:53,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:53,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787447834] [2021-06-05 04:45:53,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787447834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:53,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594661919] [2021-06-05 04:45:53,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:53,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:53,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:53,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:53,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:53,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:53,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:45:53,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:45:53,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,093 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 04:45:54,094 INFO L628 ElimStorePlain]: treesize reduction 371, result has 24.1 percent of original size [2021-06-05 04:45:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:54,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:45:54,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:54,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:54,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:54,268 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:54,308 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:54,352 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:54,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:54,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:54,386 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 04:45:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594661919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:54,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:54,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:45:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441232791] [2021-06-05 04:45:54,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:54,537 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:54,965 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 04:45:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:55,160 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-06-05 04:45:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:45:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:55,161 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:45:55,161 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:45:55,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:45:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2021-06-05 04:45:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:45:55,164 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-06-05 04:45:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:45:55,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:45:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:55,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:55,164 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:55,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3749 [2021-06-05 04:45:55,377 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash -894827320, now seen corresponding path program 71 times [2021-06-05 04:45:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444762855] [2021-06-05 04:45:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:55,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:55,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444762855] [2021-06-05 04:45:55,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444762855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023944165] [2021-06-05 04:45:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:55,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:55,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023944165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:55,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:45:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704233771] [2021-06-05 04:45:55,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:55,536 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:55,632 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-06-05 04:45:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:55,633 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:45:55,633 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:45:55,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:45:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-06-05 04:45:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.172043010752688) internal successors, (202), 93 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 202 transitions. [2021-06-05 04:45:55,635 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 202 transitions. Word has length 17 [2021-06-05 04:45:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 202 transitions. [2021-06-05 04:45:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 202 transitions. [2021-06-05 04:45:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:55,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:55,636 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:55,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-06-05 04:45:55,853 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1977338625, now seen corresponding path program 72 times [2021-06-05 04:45:55,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:55,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485534574] [2021-06-05 04:45:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:55,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:55,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485534574] [2021-06-05 04:45:55,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485534574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726711660] [2021-06-05 04:45:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:55,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726711660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:56,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:45:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555150987] [2021-06-05 04:45:56,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:45:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:45:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:56,075 INFO L87 Difference]: Start difference. First operand 94 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:56,289 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-06-05 04:45:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:56,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:56,290 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:45:56,290 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:45:56,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:45:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-06-05 04:45:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.150537634408602) internal successors, (200), 93 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 200 transitions. [2021-06-05 04:45:56,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 200 transitions. Word has length 17 [2021-06-05 04:45:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 200 transitions. [2021-06-05 04:45:56,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 200 transitions. [2021-06-05 04:45:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:56,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:56,292 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:56,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:56,501 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:56,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:56,501 INFO L82 PathProgramCache]: Analyzing trace with hash -664171210, now seen corresponding path program 73 times [2021-06-05 04:45:56,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:56,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121667620] [2021-06-05 04:45:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:56,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121667620] [2021-06-05 04:45:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121667620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022300887] [2021-06-05 04:45:56,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:56,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:56,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022300887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:56,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:45:56,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745123052] [2021-06-05 04:45:56,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:45:56,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:45:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:45:56,663 INFO L87 Difference]: Start difference. First operand 94 states and 200 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:56,764 INFO L93 Difference]: Finished difference Result 130 states and 270 transitions. [2021-06-05 04:45:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:56,764 INFO L225 Difference]: With dead ends: 130 [2021-06-05 04:45:56,764 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:45:56,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:45:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-05 04:45:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1595744680851063) internal successors, (203), 94 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 203 transitions. [2021-06-05 04:45:56,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 203 transitions. Word has length 17 [2021-06-05 04:45:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:56,769 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 203 transitions. [2021-06-05 04:45:56,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 203 transitions. [2021-06-05 04:45:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:56,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:56,770 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:56,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3907,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:56,985 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -27920449, now seen corresponding path program 74 times [2021-06-05 04:45:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:56,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554263573] [2021-06-05 04:45:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:57,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554263573] [2021-06-05 04:45:57,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554263573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398639924] [2021-06-05 04:45:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:57,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398639924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:57,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:45:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476799113] [2021-06-05 04:45:57,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:57,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:57,243 INFO L87 Difference]: Start difference. First operand 95 states and 203 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:57,420 INFO L93 Difference]: Finished difference Result 133 states and 267 transitions. [2021-06-05 04:45:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:57,421 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:45:57,421 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:45:57,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:45:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2021-06-05 04:45:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.148936170212766) internal successors, (202), 94 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 202 transitions. [2021-06-05 04:45:57,423 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 202 transitions. Word has length 17 [2021-06-05 04:45:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:57,423 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 202 transitions. [2021-06-05 04:45:57,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 202 transitions. [2021-06-05 04:45:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:57,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:57,423 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 04:45:57,637 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2049348956, now seen corresponding path program 75 times [2021-06-05 04:45:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343528207] [2021-06-05 04:45:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343528207] [2021-06-05 04:45:57,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343528207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692124038] [2021-06-05 04:45:57,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:57,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:57,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692124038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:57,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:45:57,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460796767] [2021-06-05 04:45:57,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:45:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:45:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:57,838 INFO L87 Difference]: Start difference. First operand 95 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:57,931 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 04:45:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:57,932 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:45:57,932 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:45:57,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:45:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2021-06-05 04:45:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1578947368421053) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 205 transitions. [2021-06-05 04:45:57,934 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 205 transitions. Word has length 17 [2021-06-05 04:45:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:57,934 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 205 transitions. [2021-06-05 04:45:57,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 205 transitions. [2021-06-05 04:45:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:57,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:57,934 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:58,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:58,135 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1058993413, now seen corresponding path program 76 times [2021-06-05 04:45:58,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:58,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469330234] [2021-06-05 04:45:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:58,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:58,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469330234] [2021-06-05 04:45:58,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469330234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338766004] [2021-06-05 04:45:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:58,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:58,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338766004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:58,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665652588] [2021-06-05 04:45:58,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:58,508 INFO L87 Difference]: Start difference. First operand 96 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:58,751 INFO L93 Difference]: Finished difference Result 137 states and 275 transitions. [2021-06-05 04:45:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:58,751 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:45:58,751 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:45:58,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:45:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-06-05 04:45:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1473684210526316) internal successors, (204), 95 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 204 transitions. [2021-06-05 04:45:58,753 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 204 transitions. Word has length 17 [2021-06-05 04:45:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 204 transitions. [2021-06-05 04:45:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 204 transitions. [2021-06-05 04:45:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:58,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:58,754 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:58,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:58,976 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:58,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1231103862, now seen corresponding path program 77 times [2021-06-05 04:45:58,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:58,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532116066] [2021-06-05 04:45:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:59,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532116066] [2021-06-05 04:45:59,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532116066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837554416] [2021-06-05 04:45:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:59,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:45:59,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:59,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837554416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:59,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:45:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773992312] [2021-06-05 04:45:59,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:45:59,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:45:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:59,182 INFO L87 Difference]: Start difference. First operand 96 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:59,351 INFO L93 Difference]: Finished difference Result 136 states and 274 transitions. [2021-06-05 04:45:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:45:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:45:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:59,352 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:45:59,352 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:45:59,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:45:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2021-06-05 04:45:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 208 transitions. [2021-06-05 04:45:59,353 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 208 transitions. Word has length 17 [2021-06-05 04:45:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:59,353 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 208 transitions. [2021-06-05 04:45:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 208 transitions. [2021-06-05 04:45:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:45:59,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:59,354 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:59,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-05 04:45:59,569 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1263050815, now seen corresponding path program 78 times [2021-06-05 04:45:59,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:59,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633282932] [2021-06-05 04:45:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:59,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:59,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633282932] [2021-06-05 04:45:59,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633282932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525856266] [2021-06-05 04:45:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:59,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:59,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:45:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:59,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:59,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:59,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:59,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:59,984 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 04:45:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:59,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,082 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:00,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,141 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:00,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:00,191 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525856266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:00,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:00,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26393441] [2021-06-05 04:46:00,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:00,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:00,221 INFO L87 Difference]: Start difference. First operand 97 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:00,782 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-06-05 04:46:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:00,783 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:00,783 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:46:00,783 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:46:00,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:46:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 101. [2021-06-05 04:46:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.16) internal successors, (216), 100 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 216 transitions. [2021-06-05 04:46:00,785 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 216 transitions. Word has length 17 [2021-06-05 04:46:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:00,785 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 216 transitions. [2021-06-05 04:46:00,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 216 transitions. [2021-06-05 04:46:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:00,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:00,786 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:00,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3955,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:00,997 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash 783766139, now seen corresponding path program 79 times [2021-06-05 04:46:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:00,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240441502] [2021-06-05 04:46:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:01,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240441502] [2021-06-05 04:46:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240441502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128803502] [2021-06-05 04:46:01,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:01,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:01,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:01,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,441 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:46:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:01,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:01,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:01,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:01,542 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:01,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:01,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:01,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:01,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:01,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:01,649 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:01,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128803502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:01,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:01,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753538553] [2021-06-05 04:46:01,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:01,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:01,676 INFO L87 Difference]: Start difference. First operand 101 states and 216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:01,907 INFO L93 Difference]: Finished difference Result 137 states and 280 transitions. [2021-06-05 04:46:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:01,907 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:46:01,907 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:46:01,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:46:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2021-06-05 04:46:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 207 transitions. [2021-06-05 04:46:01,909 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 207 transitions. Word has length 17 [2021-06-05 04:46:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:01,909 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 207 transitions. [2021-06-05 04:46:01,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 207 transitions. [2021-06-05 04:46:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:01,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:01,910 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:02,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:02,117 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1191895354, now seen corresponding path program 80 times [2021-06-05 04:46:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:02,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720635979] [2021-06-05 04:46:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:02,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720635979] [2021-06-05 04:46:02,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720635979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043538212] [2021-06-05 04:46:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:02,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043538212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:02,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447923450] [2021-06-05 04:46:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:02,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:02,281 INFO L87 Difference]: Start difference. First operand 97 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:02,424 INFO L93 Difference]: Finished difference Result 122 states and 251 transitions. [2021-06-05 04:46:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:02,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:02,425 INFO L225 Difference]: With dead ends: 122 [2021-06-05 04:46:02,425 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:46:02,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:46:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-06-05 04:46:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 04:46:02,428 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 04:46:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:02,428 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 04:46:02,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 04:46:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:02,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:02,429 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:02,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:02,641 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 241782728, now seen corresponding path program 81 times [2021-06-05 04:46:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213296212] [2021-06-05 04:46:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:02,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213296212] [2021-06-05 04:46:02,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213296212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764054614] [2021-06-05 04:46:02,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:02,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:02,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:02,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:02,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764054614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:02,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:46:02,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022954511] [2021-06-05 04:46:02,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:46:02,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:46:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:46:02,801 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:02,900 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-06-05 04:46:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:02,901 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:46:02,901 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:46:02,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:46:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-06-05 04:46:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 04:46:02,902 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 04:46:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:02,902 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 04:46:02,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 04:46:02,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:02,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:02,902 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:03,103 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash 878033489, now seen corresponding path program 82 times [2021-06-05 04:46:03,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:03,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267343463] [2021-06-05 04:46:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267343463] [2021-06-05 04:46:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267343463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805376480] [2021-06-05 04:46:03,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:03,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:03,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805376480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:03,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:03,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654125210] [2021-06-05 04:46:03,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:03,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:03,336 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:03,445 INFO L93 Difference]: Finished difference Result 111 states and 227 transitions. [2021-06-05 04:46:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:03,446 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:46:03,446 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:46:03,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:46:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-06-05 04:46:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 04:46:03,447 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 04:46:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:03,447 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 04:46:03,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 04:46:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:03,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:03,448 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:03,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 04:46:03,653 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1143395018, now seen corresponding path program 83 times [2021-06-05 04:46:03,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:03,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576610249] [2021-06-05 04:46:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576610249] [2021-06-05 04:46:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576610249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124809998] [2021-06-05 04:46:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:03,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:03,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124809998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:03,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:03,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079364778] [2021-06-05 04:46:03,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:03,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:03,818 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:03,916 INFO L93 Difference]: Finished difference Result 131 states and 272 transitions. [2021-06-05 04:46:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:03,917 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:46:03,917 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:46:03,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:46:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2021-06-05 04:46:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:46:03,918 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 04:46:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:03,918 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:46:03,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:46:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:03,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:03,919 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:04,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 04:46:04,119 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash -459189108, now seen corresponding path program 84 times [2021-06-05 04:46:04,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:04,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725841431] [2021-06-05 04:46:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:04,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725841431] [2021-06-05 04:46:04,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725841431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887003486] [2021-06-05 04:46:04,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:04,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:04,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:04,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:04,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887003486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:04,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:04,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8505817] [2021-06-05 04:46:04,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:04,315 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:04,408 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 04:46:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:04,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:04,409 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:46:04,409 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:46:04,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:46:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2021-06-05 04:46:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.13265306122449) internal successors, (209), 98 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 209 transitions. [2021-06-05 04:46:04,410 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 209 transitions. Word has length 17 [2021-06-05 04:46:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:04,410 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 209 transitions. [2021-06-05 04:46:04,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 209 transitions. [2021-06-05 04:46:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:04,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:04,411 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:04,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4028 [2021-06-05 04:46:04,611 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:04,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1689720077, now seen corresponding path program 85 times [2021-06-05 04:46:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:04,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279431366] [2021-06-05 04:46:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279431366] [2021-06-05 04:46:04,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279431366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897557638] [2021-06-05 04:46:04,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:04,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:04,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:04,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:04,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:04,934 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 04:46:04,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:04,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:04,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:04,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:04,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:04,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:04,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:04,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:05,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:05,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:05,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:05,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:05,023 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:46:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897557638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:05,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249094695] [2021-06-05 04:46:05,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:05,051 INFO L87 Difference]: Start difference. First operand 99 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:05,322 INFO L93 Difference]: Finished difference Result 136 states and 273 transitions. [2021-06-05 04:46:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:05,323 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:46:05,323 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:46:05,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:46:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2021-06-05 04:46:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:46:05,324 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 04:46:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:05,324 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:46:05,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:46:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:05,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:05,325 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:05,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,525 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:05,526 INFO L82 PathProgramCache]: Analyzing trace with hash -103159220, now seen corresponding path program 86 times [2021-06-05 04:46:05,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:05,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420188300] [2021-06-05 04:46:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:05,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420188300] [2021-06-05 04:46:05,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420188300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135494479] [2021-06-05 04:46:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135494479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:05,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603493123] [2021-06-05 04:46:05,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:05,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:05,777 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:05,922 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 04:46:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:05,923 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:46:05,923 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:46:05,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:46:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-06-05 04:46:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:46:05,925 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 04:46:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:05,925 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:46:05,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:46:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:05,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:05,925 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:06,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:06,137 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:06,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1117673698, now seen corresponding path program 87 times [2021-06-05 04:46:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:06,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342574978] [2021-06-05 04:46:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342574978] [2021-06-05 04:46:06,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342574978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999776249] [2021-06-05 04:46:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:06,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:06,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999776249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:06,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239944103] [2021-06-05 04:46:06,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:06,428 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:06,628 INFO L93 Difference]: Finished difference Result 155 states and 312 transitions. [2021-06-05 04:46:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:06,630 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:46:06,630 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:46:06,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:46:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 99. [2021-06-05 04:46:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-06-05 04:46:06,632 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 17 [2021-06-05 04:46:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:06,632 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-06-05 04:46:06,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-06-05 04:46:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:06,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:06,633 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:06,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 04:46:06,855 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -529928376, now seen corresponding path program 88 times [2021-06-05 04:46:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:06,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122909207] [2021-06-05 04:46:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122909207] [2021-06-05 04:46:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122909207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495851262] [2021-06-05 04:46:06,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:06,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495851262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:07,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150138195] [2021-06-05 04:46:07,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:07,161 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:07,292 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2021-06-05 04:46:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:07,293 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:46:07,293 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:46:07,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:46:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2021-06-05 04:46:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-06-05 04:46:07,295 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 17 [2021-06-05 04:46:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:07,295 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-06-05 04:46:07,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-06-05 04:46:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:07,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:07,295 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,513 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash 721454289, now seen corresponding path program 89 times [2021-06-05 04:46:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:07,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774567275] [2021-06-05 04:46:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774567275] [2021-06-05 04:46:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774567275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666557635] [2021-06-05 04:46:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:07,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:07,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:07,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:07,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:07,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:07,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:07,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:07,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:07,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:07,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:07,798 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:46:07,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:07,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:07,824 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:07,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:07,825 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:46:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666557635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:07,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:07,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047282075] [2021-06-05 04:46:07,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:07,844 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:08,008 INFO L93 Difference]: Finished difference Result 162 states and 326 transitions. [2021-06-05 04:46:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:08,008 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:46:08,009 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:46:08,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:46:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2021-06-05 04:46:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1818181818181817) internal successors, (216), 99 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 216 transitions. [2021-06-05 04:46:08,010 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 216 transitions. Word has length 17 [2021-06-05 04:46:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:08,010 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 216 transitions. [2021-06-05 04:46:08,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 216 transitions. [2021-06-05 04:46:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:08,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:08,010 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:08,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-05 04:46:08,211 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1512495901, now seen corresponding path program 90 times [2021-06-05 04:46:08,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:08,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609352242] [2021-06-05 04:46:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:08,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609352242] [2021-06-05 04:46:08,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609352242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840906444] [2021-06-05 04:46:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:08,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:08,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:08,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:08,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:08,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:08,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:08,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:08,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:08,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:08,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,496 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:08,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:08,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:08,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:08,503 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:46:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840906444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974244943] [2021-06-05 04:46:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:08,509 INFO L87 Difference]: Start difference. First operand 100 states and 216 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:08,648 INFO L93 Difference]: Finished difference Result 127 states and 265 transitions. [2021-06-05 04:46:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:08,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:08,649 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:46:08,649 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:46:08,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:46:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-06-05 04:46:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 04:46:08,653 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 04:46:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:08,654 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 04:46:08,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 04:46:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:08,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:08,654 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:08,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4218,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:08,870 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1877216436, now seen corresponding path program 91 times [2021-06-05 04:46:08,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:08,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497562066] [2021-06-05 04:46:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497562066] [2021-06-05 04:46:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497562066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794874816] [2021-06-05 04:46:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794874816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:09,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:09,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470993902] [2021-06-05 04:46:09,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:09,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:09,083 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,205 INFO L93 Difference]: Finished difference Result 114 states and 237 transitions. [2021-06-05 04:46:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:09,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,206 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:46:09,206 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:46:09,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:46:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2021-06-05 04:46:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 04:46:09,208 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 04:46:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,208 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 04:46:09,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 04:46:09,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:09,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,208 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:09,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 04:46:09,409 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1738416266, now seen corresponding path program 92 times [2021-06-05 04:46:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:09,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879821614] [2021-06-05 04:46:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:09,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879821614] [2021-06-05 04:46:09,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879821614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546652027] [2021-06-05 04:46:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546652027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:09,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:09,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523013324] [2021-06-05 04:46:09,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:09,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:09,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:09,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:09,639 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,786 INFO L93 Difference]: Finished difference Result 120 states and 251 transitions. [2021-06-05 04:46:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,787 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:46:09,787 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:46:09,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:46:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2021-06-05 04:46:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 04:46:09,788 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 04:46:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,788 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 04:46:09,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 04:46:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:09,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,789 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:10,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4274 [2021-06-05 04:46:10,009 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1102165505, now seen corresponding path program 93 times [2021-06-05 04:46:10,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:10,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774639643] [2021-06-05 04:46:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:10,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774639643] [2021-06-05 04:46:10,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774639643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495299708] [2021-06-05 04:46:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:10,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:10,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:10,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495299708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543047040] [2021-06-05 04:46:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:10,323 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:10,469 INFO L93 Difference]: Finished difference Result 115 states and 235 transitions. [2021-06-05 04:46:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:10,469 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:46:10,469 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:46:10,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:46:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2021-06-05 04:46:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:46:10,471 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 04:46:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:10,471 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:46:10,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:46:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:10,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:10,471 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:10,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4292 [2021-06-05 04:46:10,671 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1171373284, now seen corresponding path program 94 times [2021-06-05 04:46:10,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:10,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001933149] [2021-06-05 04:46:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001933149] [2021-06-05 04:46:10,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001933149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149588813] [2021-06-05 04:46:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:10,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:10,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149588813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:10,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:10,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369909933] [2021-06-05 04:46:10,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:10,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:10,993 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:11,183 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 04:46:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:11,189 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:46:11,189 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:46:11,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:46:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2021-06-05 04:46:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 04:46:11,191 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 04:46:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:11,191 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 04:46:11,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 04:46:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:11,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:11,192 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:11,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4315,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:11,408 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 156858806, now seen corresponding path program 95 times [2021-06-05 04:46:11,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:11,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662070788] [2021-06-05 04:46:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:11,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662070788] [2021-06-05 04:46:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662070788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885591837] [2021-06-05 04:46:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:11,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:11,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:11,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885591837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:11,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:11,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:11,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493250357] [2021-06-05 04:46:11,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:11,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:11,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:11,786 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:12,001 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 04:46:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:12,002 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:46:12,002 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:46:12,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:46:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2021-06-05 04:46:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 201 transitions. [2021-06-05 04:46:12,003 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 201 transitions. Word has length 17 [2021-06-05 04:46:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:12,004 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 201 transitions. [2021-06-05 04:46:12,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 201 transitions. [2021-06-05 04:46:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:12,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:12,004 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:12,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4344,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:12,209 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1229041557, now seen corresponding path program 96 times [2021-06-05 04:46:12,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:12,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048792285] [2021-06-05 04:46:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:12,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:12,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048792285] [2021-06-05 04:46:12,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048792285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:12,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614872649] [2021-06-05 04:46:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:12,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:12,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:12,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:12,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,505 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 04:46:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:12,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:12,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:12,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:12,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:12,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:12,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:12,601 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:46:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:12,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614872649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:12,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:12,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:12,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909898167] [2021-06-05 04:46:12,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:12,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:12,630 INFO L87 Difference]: Start difference. First operand 95 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:12,821 INFO L93 Difference]: Finished difference Result 129 states and 258 transitions. [2021-06-05 04:46:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:12,822 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:46:12,822 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:46:12,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:46:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2021-06-05 04:46:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.13265306122449) internal successors, (209), 98 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 209 transitions. [2021-06-05 04:46:12,824 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 209 transitions. Word has length 17 [2021-06-05 04:46:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:12,824 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 209 transitions. [2021-06-05 04:46:12,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 209 transitions. [2021-06-05 04:46:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:12,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:12,825 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:13,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-06-05 04:46:13,029 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash 749756881, now seen corresponding path program 97 times [2021-06-05 04:46:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:13,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294505273] [2021-06-05 04:46:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:13,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:13,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294505273] [2021-06-05 04:46:13,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294505273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118666240] [2021-06-05 04:46:13,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:13,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:13,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:13,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:13,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:13,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,366 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:46:13,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:13,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:13,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:13,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:13,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:13,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:13,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:13,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:13,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:13,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:13,577 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118666240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:13,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672777116] [2021-06-05 04:46:13,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:13,606 INFO L87 Difference]: Start difference. First operand 99 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:13,713 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-06-05 04:46:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:13,714 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:46:13,714 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:46:13,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:46:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-06-05 04:46:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 04:46:13,715 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-06-05 04:46:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:13,715 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 04:46:13,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 04:46:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:13,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:13,716 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:13,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,921 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1225904612, now seen corresponding path program 98 times [2021-06-05 04:46:13,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:13,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147085643] [2021-06-05 04:46:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:14,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147085643] [2021-06-05 04:46:14,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147085643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972591139] [2021-06-05 04:46:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:14,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972591139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:14,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253102075] [2021-06-05 04:46:14,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:14,242 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:14,422 INFO L93 Difference]: Finished difference Result 125 states and 256 transitions. [2021-06-05 04:46:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:14,422 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:46:14,422 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:46:14,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:46:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2021-06-05 04:46:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 04:46:14,425 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 17 [2021-06-05 04:46:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:14,425 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 04:46:14,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 04:46:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:14,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:14,426 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:14,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:14,641 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash 99180452, now seen corresponding path program 99 times [2021-06-05 04:46:14,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:14,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791399001] [2021-06-05 04:46:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791399001] [2021-06-05 04:46:14,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791399001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554977548] [2021-06-05 04:46:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:14,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554977548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:14,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133485798] [2021-06-05 04:46:14,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:14,900 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:15,025 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 04:46:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:15,026 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:46:15,026 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:46:15,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:46:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 04:46:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 04:46:15,027 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 04:46:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:15,027 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 04:46:15,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 04:46:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:15,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:15,028 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:15,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4478 [2021-06-05 04:46:15,228 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1089535995, now seen corresponding path program 100 times [2021-06-05 04:46:15,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:15,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018524415] [2021-06-05 04:46:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:15,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018524415] [2021-06-05 04:46:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018524415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64002689] [2021-06-05 04:46:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:15,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:15,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64002689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:15,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:15,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220037563] [2021-06-05 04:46:15,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:15,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:15,548 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:15,719 INFO L93 Difference]: Finished difference Result 110 states and 224 transitions. [2021-06-05 04:46:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:15,720 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:46:15,720 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:46:15,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:46:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-06-05 04:46:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 04:46:15,721 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 04:46:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:15,722 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 04:46:15,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 04:46:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:15,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:15,722 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:15,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-06-05 04:46:15,922 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash -915334026, now seen corresponding path program 101 times [2021-06-05 04:46:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:15,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551924976] [2021-06-05 04:46:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:15,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551924976] [2021-06-05 04:46:15,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551924976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742639398] [2021-06-05 04:46:15,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:16,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:16,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742639398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:16,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:16,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693569306] [2021-06-05 04:46:16,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:16,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:16,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:16,210 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:16,311 INFO L93 Difference]: Finished difference Result 131 states and 271 transitions. [2021-06-05 04:46:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:16,312 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:46:16,312 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:46:16,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:46:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2021-06-05 04:46:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 203 transitions. [2021-06-05 04:46:16,313 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 203 transitions. Word has length 17 [2021-06-05 04:46:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:16,313 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 203 transitions. [2021-06-05 04:46:16,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 203 transitions. [2021-06-05 04:46:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:16,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:16,314 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:16,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4535 [2021-06-05 04:46:16,517 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1362671749, now seen corresponding path program 102 times [2021-06-05 04:46:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:16,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842092769] [2021-06-05 04:46:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842092769] [2021-06-05 04:46:16,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842092769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35719170] [2021-06-05 04:46:16,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:16,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:16,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:16,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:16,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:16,890 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:46:16,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:16,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:16,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:16,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:16,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:16,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:16,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:16,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:16,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:17,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:17,047 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:17,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:17,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:17,098 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:17,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35719170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:17,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:17,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744074549] [2021-06-05 04:46:17,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:17,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:17,125 INFO L87 Difference]: Start difference. First operand 97 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:17,222 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-06-05 04:46:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:17,223 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:46:17,223 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:46:17,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:46:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-06-05 04:46:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 04:46:17,224 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 04:46:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:17,224 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 04:46:17,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 04:46:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:17,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:17,225 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:17,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4570,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,425 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -327588704, now seen corresponding path program 103 times [2021-06-05 04:46:17,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:17,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784208040] [2021-06-05 04:46:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784208040] [2021-06-05 04:46:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784208040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648244570] [2021-06-05 04:46:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648244570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:17,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:17,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252278669] [2021-06-05 04:46:17,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:17,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:17,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:17,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:17,677 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:17,792 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 04:46:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:17,793 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:46:17,793 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:46:17,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:46:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-06-05 04:46:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 04:46:17,795 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 04:46:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:17,795 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 04:46:17,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 04:46:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:17,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:17,795 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:18,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-05 04:46:18,013 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -774926427, now seen corresponding path program 104 times [2021-06-05 04:46:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:18,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701846422] [2021-06-05 04:46:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:18,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701846422] [2021-06-05 04:46:18,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701846422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434597687] [2021-06-05 04:46:18,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:18,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:18,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:18,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:18,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:18,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:18,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:18,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:18,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:18,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,305 INFO L628 ElimStorePlain]: treesize reduction 21, result has 61.1 percent of original size [2021-06-05 04:46:18,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:18,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:18,331 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:18,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:18,332 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-06-05 04:46:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434597687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:18,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:18,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229541871] [2021-06-05 04:46:18,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:18,354 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:18,541 INFO L93 Difference]: Finished difference Result 150 states and 300 transitions. [2021-06-05 04:46:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:18,542 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:46:18,542 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:46:18,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:46:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2021-06-05 04:46:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 04:46:18,543 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 04:46:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:18,544 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 04:46:18,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 04:46:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:18,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:18,544 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:18,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4621 [2021-06-05 04:46:18,757 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1310156229, now seen corresponding path program 105 times [2021-06-05 04:46:18,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:18,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240874357] [2021-06-05 04:46:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240874357] [2021-06-05 04:46:18,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240874357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065426785] [2021-06-05 04:46:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:18,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:18,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:19,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:19,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:19,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,052 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:46:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:19,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:19,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:46:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065426785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:19,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837715255] [2021-06-05 04:46:19,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:19,069 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:19,196 INFO L93 Difference]: Finished difference Result 119 states and 247 transitions. [2021-06-05 04:46:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:19,197 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:46:19,197 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:46:19,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:46:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-06-05 04:46:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 04:46:19,198 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 04:46:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:19,199 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 04:46:19,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 04:46:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:19,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:19,199 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:19,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4653,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:19,399 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1674876764, now seen corresponding path program 106 times [2021-06-05 04:46:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:19,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119415874] [2021-06-05 04:46:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:19,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119415874] [2021-06-05 04:46:19,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119415874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116183867] [2021-06-05 04:46:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:19,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:19,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116183867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:19,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810284796] [2021-06-05 04:46:19,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:19,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:19,689 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:19,832 INFO L93 Difference]: Finished difference Result 108 states and 222 transitions. [2021-06-05 04:46:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:19,833 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:46:19,833 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:46:19,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:46:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-06-05 04:46:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 04:46:19,834 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 17 [2021-06-05 04:46:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 04:46:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 04:46:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:19,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:19,835 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:20,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:20,047 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash 712647094, now seen corresponding path program 107 times [2021-06-05 04:46:20,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:20,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325972555] [2021-06-05 04:46:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:20,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325972555] [2021-06-05 04:46:20,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325972555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544769101] [2021-06-05 04:46:20,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:20,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:20,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:20,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544769101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:20,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:20,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917443319] [2021-06-05 04:46:20,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:20,390 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:20,579 INFO L93 Difference]: Finished difference Result 131 states and 261 transitions. [2021-06-05 04:46:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:20,580 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:46:20,580 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:46:20,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:46:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2021-06-05 04:46:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 04:46:20,581 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 04:46:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 04:46:20,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 04:46:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:20,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:20,581 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:20,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4693 [2021-06-05 04:46:20,782 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash 265309371, now seen corresponding path program 108 times [2021-06-05 04:46:20,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:20,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921676656] [2021-06-05 04:46:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:20,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:20,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921676656] [2021-06-05 04:46:20,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921676656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:20,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161567286] [2021-06-05 04:46:20,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:20,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:21,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:21,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:21,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:21,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:21,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,097 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:46:21,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:21,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,132 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:21,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:21,133 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:46:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:21,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161567286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:21,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:21,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027922972] [2021-06-05 04:46:21,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:21,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:21,154 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:21,412 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-06-05 04:46:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:21,413 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:46:21,413 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:46:21,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:46:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2021-06-05 04:46:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-06-05 04:46:21,415 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-06-05 04:46:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:21,415 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-06-05 04:46:21,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-06-05 04:46:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:21,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:21,415 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:21,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4729,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:21,629 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash -269920431, now seen corresponding path program 109 times [2021-06-05 04:46:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:21,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109066123] [2021-06-05 04:46:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109066123] [2021-06-05 04:46:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109066123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695705243] [2021-06-05 04:46:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:21,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:21,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:21,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,876 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:46:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:21,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:21,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:46:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:21,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695705243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:21,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:21,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114796979] [2021-06-05 04:46:21,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:21,890 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:22,044 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2021-06-05 04:46:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:22,045 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:46:22,045 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:46:22,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:46:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-06-05 04:46:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-06-05 04:46:22,046 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-06-05 04:46:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:22,046 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-06-05 04:46:22,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-06-05 04:46:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:22,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:22,047 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:22,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4778 [2021-06-05 04:46:22,247 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash -634640966, now seen corresponding path program 110 times [2021-06-05 04:46:22,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:22,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236246168] [2021-06-05 04:46:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:22,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236246168] [2021-06-05 04:46:22,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236246168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676545528] [2021-06-05 04:46:22,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676545528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:22,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:22,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567018122] [2021-06-05 04:46:22,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:22,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:22,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:22,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:22,477 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:22,672 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 04:46:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:22,673 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:46:22,673 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:46:22,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:46:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-06-05 04:46:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 210 transitions. [2021-06-05 04:46:22,674 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 210 transitions. Word has length 17 [2021-06-05 04:46:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:22,674 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 210 transitions. [2021-06-05 04:46:22,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 210 transitions. [2021-06-05 04:46:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:22,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:22,674 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:22,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4800,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:22,889 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash 317824891, now seen corresponding path program 111 times [2021-06-05 04:46:22,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:22,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709822576] [2021-06-05 04:46:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709822576] [2021-06-05 04:46:22,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709822576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703296945] [2021-06-05 04:46:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:23,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:23,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:23,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:23,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:23,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:23,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:23,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:23,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,188 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:23,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:23,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:23,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 04:46:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:23,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703296945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:23,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473568475] [2021-06-05 04:46:23,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:23,203 INFO L87 Difference]: Start difference. First operand 98 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:23,352 INFO L93 Difference]: Finished difference Result 115 states and 239 transitions. [2021-06-05 04:46:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:23,353 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:46:23,353 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:46:23,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:46:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-06-05 04:46:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 203 transitions. [2021-06-05 04:46:23,354 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 203 transitions. Word has length 17 [2021-06-05 04:46:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:23,354 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 203 transitions. [2021-06-05 04:46:23,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 203 transitions. [2021-06-05 04:46:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:23,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:23,355 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:23,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4820 [2021-06-05 04:46:23,555 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:23,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1647333498, now seen corresponding path program 112 times [2021-06-05 04:46:23,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:23,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143078917] [2021-06-05 04:46:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:23,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143078917] [2021-06-05 04:46:23,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143078917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188077042] [2021-06-05 04:46:23,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:23,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:23,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:23,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:23,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188077042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:23,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:23,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958650866] [2021-06-05 04:46:23,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:23,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:23,820 INFO L87 Difference]: Start difference. First operand 96 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:23,971 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2021-06-05 04:46:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:23,971 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:46:23,971 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:46:23,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:46:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-06-05 04:46:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 04:46:23,973 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 04:46:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:23,973 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 04:46:23,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 04:46:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:23,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:23,974 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:24,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4839 [2021-06-05 04:46:24,174 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1289973256, now seen corresponding path program 113 times [2021-06-05 04:46:24,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:24,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853648426] [2021-06-05 04:46:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:24,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853648426] [2021-06-05 04:46:24,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853648426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335595223] [2021-06-05 04:46:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:24,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:24,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:24,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:24,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:24,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:24,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:24,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,486 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:24,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:24,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:24,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:24,494 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:46:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335595223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:24,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738984467] [2021-06-05 04:46:24,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:24,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:24,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:24,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:24,499 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:24,640 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2021-06-05 04:46:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:24,640 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:46:24,640 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:46:24,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:46:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-06-05 04:46:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 04:46:24,642 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 04:46:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:24,642 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 04:46:24,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 04:46:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:24,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:24,642 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:24,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4856,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,853 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1926224017, now seen corresponding path program 114 times [2021-06-05 04:46:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:24,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616712404] [2021-06-05 04:46:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616712404] [2021-06-05 04:46:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616712404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54871004] [2021-06-05 04:46:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:24,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:24,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54871004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:25,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373507385] [2021-06-05 04:46:25,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:25,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:25,088 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:25,213 INFO L93 Difference]: Finished difference Result 110 states and 223 transitions. [2021-06-05 04:46:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:25,213 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:46:25,213 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:46:25,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:46:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-06-05 04:46:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 04:46:25,215 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 04:46:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:25,215 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 04:46:25,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 04:46:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:25,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:25,215 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:25,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4879,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:25,421 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -95204490, now seen corresponding path program 115 times [2021-06-05 04:46:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:25,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890013286] [2021-06-05 04:46:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:25,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890013286] [2021-06-05 04:46:25,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890013286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313711798] [2021-06-05 04:46:25,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:25,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:25,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:25,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:25,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:25,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,727 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:46:25,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:25,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:25,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:46:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313711798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:25,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:25,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966348187] [2021-06-05 04:46:25,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:25,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:25,742 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:25,957 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 04:46:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:25,958 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:46:25,958 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:46:25,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:46:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 04:46:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 04:46:25,959 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 04:46:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:25,960 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 04:46:25,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 04:46:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:25,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:25,960 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:26,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4898,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,161 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash 895151053, now seen corresponding path program 116 times [2021-06-05 04:46:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:26,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609384853] [2021-06-05 04:46:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:26,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609384853] [2021-06-05 04:46:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609384853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029762747] [2021-06-05 04:46:26,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:26,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029762747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:26,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037627433] [2021-06-05 04:46:26,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:26,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:26,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:26,410 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:26,553 INFO L93 Difference]: Finished difference Result 113 states and 229 transitions. [2021-06-05 04:46:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:26,553 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:46:26,553 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:46:26,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:46:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2021-06-05 04:46:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 95 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 200 transitions. [2021-06-05 04:46:26,555 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 200 transitions. Word has length 17 [2021-06-05 04:46:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:26,555 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 200 transitions. [2021-06-05 04:46:26,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 200 transitions. [2021-06-05 04:46:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:26,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:26,555 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:26,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4922,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,756 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1109718968, now seen corresponding path program 117 times [2021-06-05 04:46:26,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:26,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095545332] [2021-06-05 04:46:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:26,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:26,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095545332] [2021-06-05 04:46:26,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095545332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693085507] [2021-06-05 04:46:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:26,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:27,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:27,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:27,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:27,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:27,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:27,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:27,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:27,062 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-06-05 04:46:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:27,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:27,088 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:27,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:27,088 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:46:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693085507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:27,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:27,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:27,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825864167] [2021-06-05 04:46:27,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:27,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:27,110 INFO L87 Difference]: Start difference. First operand 96 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:27,364 INFO L93 Difference]: Finished difference Result 134 states and 270 transitions. [2021-06-05 04:46:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:27,365 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:46:27,365 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:46:27,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:46:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2021-06-05 04:46:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 04:46:27,366 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 04:46:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:27,366 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 04:46:27,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 04:46:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:27,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:27,366 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:27,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4941,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:27,567 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1077772015, now seen corresponding path program 118 times [2021-06-05 04:46:27,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:27,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414350916] [2021-06-05 04:46:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414350916] [2021-06-05 04:46:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414350916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500757207] [2021-06-05 04:46:27,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:27,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500757207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:27,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:27,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795764583] [2021-06-05 04:46:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:27,888 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:28,116 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 04:46:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:28,116 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:46:28,116 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:46:28,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:46:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2021-06-05 04:46:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 212 transitions. [2021-06-05 04:46:28,118 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 212 transitions. Word has length 17 [2021-06-05 04:46:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:28,118 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 212 transitions. [2021-06-05 04:46:28,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 212 transitions. [2021-06-05 04:46:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:28,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:28,118 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:28,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4983 [2021-06-05 04:46:28,325 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1557056691, now seen corresponding path program 119 times [2021-06-05 04:46:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:28,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837740293] [2021-06-05 04:46:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:28,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837740293] [2021-06-05 04:46:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837740293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266216535] [2021-06-05 04:46:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:28,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:28,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266216535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:28,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:28,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932861165] [2021-06-05 04:46:28,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:28,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:28,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:28,598 INFO L87 Difference]: Start difference. First operand 101 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:28,688 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2021-06-05 04:46:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:28,689 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:46:28,689 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:46:28,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:46:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-06-05 04:46:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 203 transitions. [2021-06-05 04:46:28,690 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 203 transitions. Word has length 17 [2021-06-05 04:46:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:28,690 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 203 transitions. [2021-06-05 04:46:28,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 203 transitions. [2021-06-05 04:46:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:28,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:28,691 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:28,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5011 [2021-06-05 04:46:28,891 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 762249112, now seen corresponding path program 120 times [2021-06-05 04:46:28,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:28,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365013180] [2021-06-05 04:46:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:28,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365013180] [2021-06-05 04:46:28,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365013180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29172715] [2021-06-05 04:46:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:28,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:29,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:29,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:29,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:29,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:29,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,189 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:46:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:29,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,214 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:29,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:29,215 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:46:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29172715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:29,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:29,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3558376] [2021-06-05 04:46:29,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:29,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:29,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:29,237 INFO L87 Difference]: Start difference. First operand 97 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:29,387 INFO L93 Difference]: Finished difference Result 111 states and 228 transitions. [2021-06-05 04:46:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:29,387 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:46:29,387 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:46:29,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:46:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2021-06-05 04:46:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 04:46:29,389 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 04:46:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:29,389 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 04:46:29,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 04:46:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:29,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:29,389 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:29,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:29,597 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 945031308, now seen corresponding path program 121 times [2021-06-05 04:46:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833596347] [2021-06-05 04:46:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:29,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833596347] [2021-06-05 04:46:29,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833596347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432504780] [2021-06-05 04:46:29,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:29,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:29,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:29,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:29,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:29,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:29,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:29,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,915 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:29,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:29,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:29,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:29,923 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:46:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432504780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:29,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533794077] [2021-06-05 04:46:29,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:29,928 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:30,049 INFO L93 Difference]: Finished difference Result 112 states and 232 transitions. [2021-06-05 04:46:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:30,049 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:46:30,049 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:46:30,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:46:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-06-05 04:46:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 04:46:30,051 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 04:46:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:30,051 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 04:46:30,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 04:46:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:30,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:30,051 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:30,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5083 [2021-06-05 04:46:30,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -69483170, now seen corresponding path program 122 times [2021-06-05 04:46:30,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:30,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046580861] [2021-06-05 04:46:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:30,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046580861] [2021-06-05 04:46:30,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046580861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293133014] [2021-06-05 04:46:30,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:30,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:30,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:30,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:30,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:30,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:30,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:30,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:30,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:30,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:30,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:30,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,702 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:46:30,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:30,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,737 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:30,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:30,738 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:46:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:30,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293133014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:30,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:30,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518998725] [2021-06-05 04:46:30,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:30,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:30,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:30,770 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:30,959 INFO L93 Difference]: Finished difference Result 125 states and 258 transitions. [2021-06-05 04:46:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:30,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:30,960 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:46:30,960 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:46:30,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:46:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2021-06-05 04:46:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:30,961 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:30,961 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:30,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:30,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:30,962 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:31,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:31,165 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -516820893, now seen corresponding path program 123 times [2021-06-05 04:46:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579385579] [2021-06-05 04:46:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:31,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579385579] [2021-06-05 04:46:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579385579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66671028] [2021-06-05 04:46:31,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:31,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66671028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:31,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507024179] [2021-06-05 04:46:31,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:31,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:31,416 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:31,521 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-06-05 04:46:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:31,521 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:46:31,521 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:46:31,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:46:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-06-05 04:46:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-06-05 04:46:31,523 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-06-05 04:46:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:31,523 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-06-05 04:46:31,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-06-05 04:46:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:31,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:31,523 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:31,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5198 [2021-06-05 04:46:31,737 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 518262152, now seen corresponding path program 124 times [2021-06-05 04:46:31,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:31,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035624855] [2021-06-05 04:46:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:31,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:31,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035624855] [2021-06-05 04:46:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035624855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221056358] [2021-06-05 04:46:31,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:31,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:32,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:32,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,170 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 04:46:32,171 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:46:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:32,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:32,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:32,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:32,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:32,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:32,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:32,370 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:32,393 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:32,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221056358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:32,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:32,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:32,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363733822] [2021-06-05 04:46:32,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:32,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:32,421 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:32,602 INFO L93 Difference]: Finished difference Result 121 states and 241 transitions. [2021-06-05 04:46:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:32,603 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:46:32,603 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:46:32,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:46:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 04:46:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 04:46:32,604 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 04:46:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:32,605 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 04:46:32,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 04:46:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:32,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:32,605 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:32,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5227,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:32,817 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash -464305373, now seen corresponding path program 125 times [2021-06-05 04:46:32,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:32,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13040423] [2021-06-05 04:46:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:32,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:32,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13040423] [2021-06-05 04:46:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13040423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:32,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031875536] [2021-06-05 04:46:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:32,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:33,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031875536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:33,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919809425] [2021-06-05 04:46:33,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:33,073 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:33,196 INFO L93 Difference]: Finished difference Result 116 states and 241 transitions. [2021-06-05 04:46:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:33,197 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:46:33,197 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:46:33,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:46:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 04:46:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 04:46:33,198 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 04:46:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:33,198 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 04:46:33,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 04:46:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:33,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:33,199 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:33,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5250 [2021-06-05 04:46:33,409 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash -829025908, now seen corresponding path program 126 times [2021-06-05 04:46:33,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:33,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620173016] [2021-06-05 04:46:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:33,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:33,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620173016] [2021-06-05 04:46:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620173016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953175336] [2021-06-05 04:46:33,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:33,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:33,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:33,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953175336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:33,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:33,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070137819] [2021-06-05 04:46:33,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:33,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:33,693 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:33,848 INFO L93 Difference]: Finished difference Result 104 states and 213 transitions. [2021-06-05 04:46:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:33,848 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:46:33,848 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:46:33,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:46:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 04:46:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:33,850 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:33,850 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:33,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:33,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:33,850 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:34,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5279,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,050 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1167397322, now seen corresponding path program 127 times [2021-06-05 04:46:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:34,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142759521] [2021-06-05 04:46:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:34,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142759521] [2021-06-05 04:46:34,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142759521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053168792] [2021-06-05 04:46:34,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:34,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:34,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:34,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:34,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,317 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:34,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:34,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:34,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,324 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:46:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053168792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:34,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:34,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107437529] [2021-06-05 04:46:34,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:34,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:34,329 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:34,463 INFO L93 Difference]: Finished difference Result 116 states and 239 transitions. [2021-06-05 04:46:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:34,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:34,463 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:46:34,463 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:46:34,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:46:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 04:46:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:34,464 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:34,464 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:34,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:34,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:34,465 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:34,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5301,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,665 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -177041779, now seen corresponding path program 128 times [2021-06-05 04:46:34,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:34,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589973043] [2021-06-05 04:46:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:34,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589973043] [2021-06-05 04:46:34,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589973043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401541588] [2021-06-05 04:46:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401541588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:34,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025152471] [2021-06-05 04:46:34,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:34,905 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:35,045 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2021-06-05 04:46:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:35,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:35,046 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:46:35,046 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:46:35,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:46:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 04:46:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.095744680851064) internal successors, (197), 94 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 197 transitions. [2021-06-05 04:46:35,047 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 197 transitions. Word has length 17 [2021-06-05 04:46:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:35,047 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 197 transitions. [2021-06-05 04:46:35,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 197 transitions. [2021-06-05 04:46:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:35,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:35,048 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5331 [2021-06-05 04:46:35,248 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2113055496, now seen corresponding path program 129 times [2021-06-05 04:46:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466841633] [2021-06-05 04:46:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:35,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466841633] [2021-06-05 04:46:35,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466841633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963959334] [2021-06-05 04:46:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:35,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:35,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:35,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:35,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:35,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:35,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:35,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:35,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:35,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:35,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:35,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:35,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:35,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,635 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:46:35,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:35,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:35,661 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:35,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:35,662 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:46:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:35,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963959334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:35,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:35,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:35,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735794075] [2021-06-05 04:46:35,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:35,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:35,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:35,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:35,683 INFO L87 Difference]: Start difference. First operand 95 states and 197 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:35,808 INFO L93 Difference]: Finished difference Result 127 states and 261 transitions. [2021-06-05 04:46:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:35,808 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:46:35,808 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:46:35,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:46:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-06-05 04:46:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.094736842105263) internal successors, (199), 95 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 199 transitions. [2021-06-05 04:46:35,810 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 199 transitions. Word has length 17 [2021-06-05 04:46:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 199 transitions. [2021-06-05 04:46:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 199 transitions. [2021-06-05 04:46:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:35,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:35,810 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:36,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5351 [2021-06-05 04:46:36,015 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1665717773, now seen corresponding path program 130 times [2021-06-05 04:46:36,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:36,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133895819] [2021-06-05 04:46:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:36,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133895819] [2021-06-05 04:46:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133895819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418479102] [2021-06-05 04:46:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:36,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:36,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418479102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:36,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:36,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929973317] [2021-06-05 04:46:36,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:36,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:36,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:36,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:36,279 INFO L87 Difference]: Start difference. First operand 96 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:36,392 INFO L93 Difference]: Finished difference Result 102 states and 211 transitions. [2021-06-05 04:46:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:36,392 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:46:36,392 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:46:36,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:46:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-06-05 04:46:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.096774193548387) internal successors, (195), 93 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 195 transitions. [2021-06-05 04:46:36,394 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 195 transitions. Word has length 17 [2021-06-05 04:46:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:36,394 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 195 transitions. [2021-06-05 04:46:36,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 195 transitions. [2021-06-05 04:46:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:36,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:36,394 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:36,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5414,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:36,595 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1594166478, now seen corresponding path program 131 times [2021-06-05 04:46:36,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:36,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286243841] [2021-06-05 04:46:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:36,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:36,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286243841] [2021-06-05 04:46:36,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286243841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242743147] [2021-06-05 04:46:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:36,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:36,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:36,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:36,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,945 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 04:46:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:36,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:36,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:36,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:36,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:37,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:37,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:37,008 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:46:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242743147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:37,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:37,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747682042] [2021-06-05 04:46:37,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:37,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:37,036 INFO L87 Difference]: Start difference. First operand 94 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:37,149 INFO L93 Difference]: Finished difference Result 120 states and 239 transitions. [2021-06-05 04:46:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:37,150 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:46:37,150 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:46:37,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:46:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 04:46:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 95 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 200 transitions. [2021-06-05 04:46:37,151 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 200 transitions. Word has length 17 [2021-06-05 04:46:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:37,151 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 200 transitions. [2021-06-05 04:46:37,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 200 transitions. [2021-06-05 04:46:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:37,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:37,151 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:37,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5452 [2021-06-05 04:46:37,352 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2041504201, now seen corresponding path program 132 times [2021-06-05 04:46:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:37,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98426764] [2021-06-05 04:46:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:37,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98426764] [2021-06-05 04:46:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98426764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671862650] [2021-06-05 04:46:37,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:37,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:37,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:37,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671862650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:37,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:37,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556868125] [2021-06-05 04:46:37,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:37,618 INFO L87 Difference]: Start difference. First operand 96 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:37,795 INFO L93 Difference]: Finished difference Result 151 states and 299 transitions. [2021-06-05 04:46:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:37,796 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:46:37,796 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:46:37,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:46:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2021-06-05 04:46:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 04:46:37,797 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 04:46:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:37,797 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 04:46:37,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 04:46:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:37,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:37,797 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:37,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5472 [2021-06-05 04:46:37,998 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1718233293, now seen corresponding path program 133 times [2021-06-05 04:46:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614868589] [2021-06-05 04:46:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614868589] [2021-06-05 04:46:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614868589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287804939] [2021-06-05 04:46:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287804939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:38,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:38,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496894302] [2021-06-05 04:46:38,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:38,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:38,220 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:38,370 INFO L93 Difference]: Finished difference Result 116 states and 240 transitions. [2021-06-05 04:46:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:38,371 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:46:38,371 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:46:38,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:46:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 04:46:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:38,372 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:38,372 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:38,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:38,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:38,372 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:38,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5500,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:38,573 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1353512758, now seen corresponding path program 134 times [2021-06-05 04:46:38,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:38,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705382143] [2021-06-05 04:46:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:38,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705382143] [2021-06-05 04:46:38,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705382143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755159583] [2021-06-05 04:46:38,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755159583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:38,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719319] [2021-06-05 04:46:38,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:38,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:38,877 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:39,080 INFO L93 Difference]: Finished difference Result 104 states and 212 transitions. [2021-06-05 04:46:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:39,080 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:46:39,080 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:46:39,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:46:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 04:46:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.097826086956522) internal successors, (193), 92 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 193 transitions. [2021-06-05 04:46:39,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 193 transitions. Word has length 17 [2021-06-05 04:46:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:39,081 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 193 transitions. [2021-06-05 04:46:39,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 193 transitions. [2021-06-05 04:46:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:39,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:39,082 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:39,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:39,282 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -553930680, now seen corresponding path program 135 times [2021-06-05 04:46:39,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980210974] [2021-06-05 04:46:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:39,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:39,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980210974] [2021-06-05 04:46:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980210974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:39,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244412040] [2021-06-05 04:46:39,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:39,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:39,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:39,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:39,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,661 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 04:46:39,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:39,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:39,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:39,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:39,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:39,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:39,817 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:39,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:39,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:39,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:39,866 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244412040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881873546] [2021-06-05 04:46:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:39,894 INFO L87 Difference]: Start difference. First operand 93 states and 193 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:40,211 INFO L93 Difference]: Finished difference Result 127 states and 251 transitions. [2021-06-05 04:46:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:40,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:40,211 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:46:40,211 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:46:40,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:46:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-06-05 04:46:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 04:46:40,212 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 04:46:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:40,213 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 04:46:40,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 04:46:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:40,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:40,213 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:40,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 04:46:40,417 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1001268403, now seen corresponding path program 136 times [2021-06-05 04:46:40,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:40,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124393708] [2021-06-05 04:46:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:40,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124393708] [2021-06-05 04:46:40,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124393708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900885872] [2021-06-05 04:46:40,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:40,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:40,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900885872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:40,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790115068] [2021-06-05 04:46:40,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:40,701 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:40,990 INFO L93 Difference]: Finished difference Result 146 states and 289 transitions. [2021-06-05 04:46:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:40,990 INFO L225 Difference]: With dead ends: 146 [2021-06-05 04:46:40,990 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:46:40,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:46:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2021-06-05 04:46:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 04:46:40,992 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 04:46:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:40,992 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 04:46:40,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 04:46:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:40,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:40,992 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:41,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-06-05 04:46:41,193 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1536498205, now seen corresponding path program 137 times [2021-06-05 04:46:41,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:41,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212092221] [2021-06-05 04:46:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212092221] [2021-06-05 04:46:41,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212092221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008404944] [2021-06-05 04:46:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:41,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008404944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697413213] [2021-06-05 04:46:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:41,432 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:41,612 INFO L93 Difference]: Finished difference Result 118 states and 245 transitions. [2021-06-05 04:46:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:41,612 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:46:41,612 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:46:41,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:46:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-06-05 04:46:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 04:46:41,613 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 04:46:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 04:46:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 04:46:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:41,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:41,614 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:41,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5593 [2021-06-05 04:46:41,814 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1901218740, now seen corresponding path program 138 times [2021-06-05 04:46:41,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:41,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735264305] [2021-06-05 04:46:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:41,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735264305] [2021-06-05 04:46:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735264305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709705179] [2021-06-05 04:46:41,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:41,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709705179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:42,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948566654] [2021-06-05 04:46:42,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:42,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:42,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:42,160 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:42,490 INFO L93 Difference]: Finished difference Result 116 states and 239 transitions. [2021-06-05 04:46:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:42,491 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:46:42,491 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:46:42,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:46:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2021-06-05 04:46:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 04:46:42,492 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 04:46:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:42,492 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 04:46:42,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 04:46:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:42,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:42,492 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:42,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5614,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:42,693 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -948752883, now seen corresponding path program 139 times [2021-06-05 04:46:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:42,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115578049] [2021-06-05 04:46:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:42,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:42,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115578049] [2021-06-05 04:46:42,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115578049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192528329] [2021-06-05 04:46:42,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:42,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192528329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:42,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206666764] [2021-06-05 04:46:42,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:42,936 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:43,075 INFO L93 Difference]: Finished difference Result 114 states and 235 transitions. [2021-06-05 04:46:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:43,075 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:46:43,075 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:46:43,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:46:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-06-05 04:46:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 04:46:43,077 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 04:46:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:43,077 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 04:46:43,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 04:46:43,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:43,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:43,077 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:43,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5637 [2021-06-05 04:46:43,280 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1381056024, now seen corresponding path program 140 times [2021-06-05 04:46:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:43,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065644980] [2021-06-05 04:46:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:43,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:43,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065644980] [2021-06-05 04:46:43,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065644980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:43,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290103620] [2021-06-05 04:46:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:43,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290103620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:43,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:43,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:43,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901901649] [2021-06-05 04:46:43,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:43,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:43,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:43,572 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:43,731 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 04:46:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:43,731 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:46:43,731 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:46:43,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:46:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-06-05 04:46:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 04:46:43,733 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 04:46:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:43,733 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 04:46:43,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 04:46:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:43,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:43,733 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:43,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,934 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1642480648, now seen corresponding path program 141 times [2021-06-05 04:46:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:43,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580198611] [2021-06-05 04:46:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:44,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580198611] [2021-06-05 04:46:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580198611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548524193] [2021-06-05 04:46:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:44,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:46:44,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:44,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:44,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:44,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,213 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:46:44,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:44,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:44,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:46:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548524193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:44,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:44,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713672463] [2021-06-05 04:46:44,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:44,225 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:44,354 INFO L93 Difference]: Finished difference Result 121 states and 249 transitions. [2021-06-05 04:46:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:44,354 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:46:44,354 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:46:44,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:46:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-06-05 04:46:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 04:46:44,355 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 04:46:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:44,356 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 04:46:44,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 04:46:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:44,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:44,356 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-06-05 04:46:44,556 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1968280738, now seen corresponding path program 142 times [2021-06-05 04:46:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779100175] [2021-06-05 04:46:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:44,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779100175] [2021-06-05 04:46:44,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779100175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784574723] [2021-06-05 04:46:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:44,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:44,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:44,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:44,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:44,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:44,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:44,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:44,862 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,895 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:46:44,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:44,897 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,920 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:46:44,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:44,921 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:46:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784574723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:44,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:44,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141026415] [2021-06-05 04:46:44,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:44,941 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:45,092 INFO L93 Difference]: Finished difference Result 127 states and 260 transitions. [2021-06-05 04:46:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:45,093 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:46:45,093 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:46:45,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:46:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2021-06-05 04:46:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 187 transitions. [2021-06-05 04:46:45,094 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 187 transitions. Word has length 17 [2021-06-05 04:46:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:45,094 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 187 transitions. [2021-06-05 04:46:45,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 187 transitions. [2021-06-05 04:46:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:45,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:45,095 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:45,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5713 [2021-06-05 04:46:45,313 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash 180628447, now seen corresponding path program 143 times [2021-06-05 04:46:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:45,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014252793] [2021-06-05 04:46:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:45,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014252793] [2021-06-05 04:46:45,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014252793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265601182] [2021-06-05 04:46:45,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:45,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:46:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265601182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:45,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665881045] [2021-06-05 04:46:45,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:45,582 INFO L87 Difference]: Start difference. First operand 91 states and 187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:45,701 INFO L93 Difference]: Finished difference Result 104 states and 213 transitions. [2021-06-05 04:46:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:45,702 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:46:45,702 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:46:45,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:46:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2021-06-05 04:46:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-06-05 04:46:45,703 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-06-05 04:46:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:45,703 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-06-05 04:46:45,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-06-05 04:46:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:45,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:45,703 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:45,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5781 [2021-06-05 04:46:45,917 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1215711492, now seen corresponding path program 144 times [2021-06-05 04:46:45,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:45,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601473040] [2021-06-05 04:46:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:45,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601473040] [2021-06-05 04:46:45,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601473040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923323733] [2021-06-05 04:46:45,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:46,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:46,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:46,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,256 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 04:46:46,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:46,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:46,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:46,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:46,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:46,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:46,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:46,439 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:46,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:46,462 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:46,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923323733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:46,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:46,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005896095] [2021-06-05 04:46:46,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:46,489 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:46,637 INFO L93 Difference]: Finished difference Result 125 states and 247 transitions. [2021-06-05 04:46:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:46,637 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:46:46,637 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:46:46,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:46:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2021-06-05 04:46:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 187 transitions. [2021-06-05 04:46:46,639 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 187 transitions. Word has length 17 [2021-06-05 04:46:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 187 transitions. [2021-06-05 04:46:46,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 187 transitions. [2021-06-05 04:46:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:46,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:46,639 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:46,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-05 04:46:46,841 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1247658445, now seen corresponding path program 145 times [2021-06-05 04:46:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114841216] [2021-06-05 04:46:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:46,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114841216] [2021-06-05 04:46:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114841216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481520386] [2021-06-05 04:46:46,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481520386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:47,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:47,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:47,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853704626] [2021-06-05 04:46:47,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:47,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:47,154 INFO L87 Difference]: Start difference. First operand 90 states and 187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:47,362 INFO L93 Difference]: Finished difference Result 136 states and 267 transitions. [2021-06-05 04:46:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:47,362 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:46:47,362 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:46:47,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:46:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-06-05 04:46:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:47,364 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:47,364 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:47,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:47,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:47,364 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:47,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:47,564 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash 768373769, now seen corresponding path program 146 times [2021-06-05 04:46:47,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:47,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717113052] [2021-06-05 04:46:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:47,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:47,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717113052] [2021-06-05 04:46:47,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717113052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:47,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217289599] [2021-06-05 04:46:47,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:47,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:47,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:47,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:47,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217289599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:47,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:47,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:47,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214799715] [2021-06-05 04:46:47,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:47,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:47,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:47,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:47,876 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:48,072 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-06-05 04:46:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:48,072 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:46:48,072 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:46:48,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:46:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2021-06-05 04:46:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 04:46:48,074 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 04:46:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:48,074 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 04:46:48,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 04:46:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:48,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:48,074 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:48,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5894 [2021-06-05 04:46:48,274 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1207287724, now seen corresponding path program 147 times [2021-06-05 04:46:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:48,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490369986] [2021-06-05 04:46:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:48,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490369986] [2021-06-05 04:46:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490369986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102438979] [2021-06-05 04:46:48,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:48,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:48,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:48,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:48,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:48,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,628 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:46:48,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:48,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:48,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:48,695 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:48,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:48,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:48,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:48,808 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:48,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:48,832 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:48,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102438979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:48,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938766346] [2021-06-05 04:46:48,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:48,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:48,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:48,859 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:49,058 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 04:46:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:49,059 INFO L225 Difference]: With dead ends: 130 [2021-06-05 04:46:49,059 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:46:49,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:46:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 94. [2021-06-05 04:46:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.096774193548387) internal successors, (195), 93 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 195 transitions. [2021-06-05 04:46:49,060 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 195 transitions. Word has length 17 [2021-06-05 04:46:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:49,060 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 195 transitions. [2021-06-05 04:46:49,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 195 transitions. [2021-06-05 04:46:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:49,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:49,061 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:49,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5949,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:49,261 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 233143967, now seen corresponding path program 148 times [2021-06-05 04:46:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378890522] [2021-06-05 04:46:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:49,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378890522] [2021-06-05 04:46:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378890522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093673056] [2021-06-05 04:46:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:49,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:49,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:49,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093673056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:49,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:49,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637537881] [2021-06-05 04:46:49,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:49,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:49,468 INFO L87 Difference]: Start difference. First operand 94 states and 195 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:49,632 INFO L93 Difference]: Finished difference Result 114 states and 232 transitions. [2021-06-05 04:46:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:49,633 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:46:49,633 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:46:49,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:46:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-06-05 04:46:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-06-05 04:46:49,634 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-06-05 04:46:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:49,634 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-06-05 04:46:49,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-06-05 04:46:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:49,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:49,635 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:49,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5973,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:49,857 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -131576568, now seen corresponding path program 149 times [2021-06-05 04:46:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:49,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536643256] [2021-06-05 04:46:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:49,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536643256] [2021-06-05 04:46:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536643256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222255877] [2021-06-05 04:46:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:49,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:49,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222255877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:50,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:50,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701825646] [2021-06-05 04:46:50,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:50,171 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:50,349 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 04:46:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:50,350 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:46:50,350 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:46:50,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:46:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-06-05 04:46:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 04:46:50,351 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 04:46:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:50,351 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 04:46:50,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 04:46:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:50,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:50,351 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:50,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5994,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:50,552 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2039020006, now seen corresponding path program 150 times [2021-06-05 04:46:50,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:50,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301157332] [2021-06-05 04:46:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:50,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:50,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301157332] [2021-06-05 04:46:50,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301157332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851575669] [2021-06-05 04:46:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:50,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:50,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:50,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:50,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:50,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:50,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,959 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 04:46:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:50,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:50,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:51,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:51,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:51,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:51,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:51,142 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:51,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:51,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:51,166 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851575669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:51,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:51,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:51,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016772524] [2021-06-05 04:46:51,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:51,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:51,199 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:51,537 INFO L93 Difference]: Finished difference Result 126 states and 244 transitions. [2021-06-05 04:46:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:51,537 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:46:51,537 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:46:51,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:46:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2021-06-05 04:46:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 04:46:51,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 04:46:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:51,539 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 04:46:51,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 04:46:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:51,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:51,539 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:51,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6023 [2021-06-05 04:46:51,739 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1808609567, now seen corresponding path program 151 times [2021-06-05 04:46:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:51,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429197638] [2021-06-05 04:46:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:51,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429197638] [2021-06-05 04:46:51,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429197638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553127454] [2021-06-05 04:46:51,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:51,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553127454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:52,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:52,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851555846] [2021-06-05 04:46:52,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:52,094 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:52,311 INFO L93 Difference]: Finished difference Result 132 states and 256 transitions. [2021-06-05 04:46:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:52,312 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:46:52,312 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 04:46:52,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 04:46:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2021-06-05 04:46:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-06-05 04:46:52,313 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 17 [2021-06-05 04:46:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:52,313 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-06-05 04:46:52,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-06-05 04:46:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:52,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:52,313 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:52,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6045 [2021-06-05 04:46:52,514 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1273379765, now seen corresponding path program 152 times [2021-06-05 04:46:52,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:52,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356604102] [2021-06-05 04:46:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:52,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:52,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356604102] [2021-06-05 04:46:52,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356604102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089129005] [2021-06-05 04:46:52,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:52,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:52,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:52,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089129005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:52,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55833688] [2021-06-05 04:46:52,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:52,767 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:52,891 INFO L93 Difference]: Finished difference Result 109 states and 222 transitions. [2021-06-05 04:46:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:52,892 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:46:52,892 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:46:52,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:46:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2021-06-05 04:46:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-06-05 04:46:52,893 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 17 [2021-06-05 04:46:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:52,893 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-06-05 04:46:52,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-06-05 04:46:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:52,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:52,893 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:53,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6112 [2021-06-05 04:46:53,094 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash 908659230, now seen corresponding path program 153 times [2021-06-05 04:46:53,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:53,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106370017] [2021-06-05 04:46:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:53,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106370017] [2021-06-05 04:46:53,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106370017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503583530] [2021-06-05 04:46:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503583530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:53,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394165855] [2021-06-05 04:46:53,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:53,424 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:53,673 INFO L93 Difference]: Finished difference Result 115 states and 224 transitions. [2021-06-05 04:46:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:53,674 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:46:53,674 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:46:53,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:46:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2021-06-05 04:46:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 183 transitions. [2021-06-05 04:46:53,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 183 transitions. Word has length 17 [2021-06-05 04:46:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:53,675 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 183 transitions. [2021-06-05 04:46:53,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 183 transitions. [2021-06-05 04:46:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:53,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:53,676 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:53,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6141,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,876 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:53,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1861125087, now seen corresponding path program 154 times [2021-06-05 04:46:53,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:53,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100832235] [2021-06-05 04:46:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100832235] [2021-06-05 04:46:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100832235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546676194] [2021-06-05 04:46:53,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:53,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:54,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546676194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:54,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:54,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114036090] [2021-06-05 04:46:54,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:54,068 INFO L87 Difference]: Start difference. First operand 88 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:54,205 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2021-06-05 04:46:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:54,206 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:46:54,206 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:46:54,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:46:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2021-06-05 04:46:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 04:46:54,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 17 [2021-06-05 04:46:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 04:46:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 04:46:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:54,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:54,207 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:54,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 04:46:54,414 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash -104033302, now seen corresponding path program 155 times [2021-06-05 04:46:54,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:54,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905553612] [2021-06-05 04:46:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:54,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905553612] [2021-06-05 04:46:54,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905553612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590106937] [2021-06-05 04:46:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:54,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:54,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:54,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590106937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:54,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812077748] [2021-06-05 04:46:54,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:54,708 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:54,835 INFO L93 Difference]: Finished difference Result 91 states and 180 transitions. [2021-06-05 04:46:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:54,836 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:46:54,836 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:46:54,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:46:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-06-05 04:46:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 04:46:54,837 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 04:46:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:54,837 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 04:46:54,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 04:46:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:54,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:54,837 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:55,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6172,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:55,038 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -701452792, now seen corresponding path program 156 times [2021-06-05 04:46:55,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:55,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680801238] [2021-06-05 04:46:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:55,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680801238] [2021-06-05 04:46:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680801238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136404245] [2021-06-05 04:46:55,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:55,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:46:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:55,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:55,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,464 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:46:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:55,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:55,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:55,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:55,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:55,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:55,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:55,646 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:55,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:55,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:55,670 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:46:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:55,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136404245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:55,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:55,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427720588] [2021-06-05 04:46:55,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:55,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:55,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:55,699 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:56,168 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2021-06-05 04:46:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:56,169 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:46:56,169 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:46:56,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:46:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-06-05 04:46:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-06-05 04:46:56,170 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 17 [2021-06-05 04:46:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:56,170 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-06-05 04:46:56,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-06-05 04:46:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:56,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:56,170 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:56,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6185 [2021-06-05 04:46:56,371 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1684020317, now seen corresponding path program 157 times [2021-06-05 04:46:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:56,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542444523] [2021-06-05 04:46:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:56,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542444523] [2021-06-05 04:46:56,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542444523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274949070] [2021-06-05 04:46:56,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274949070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457860885] [2021-06-05 04:46:56,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:56,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:56,552 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:56,664 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 04:46:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:56,665 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:46:56,665 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:46:56,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:46:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-06-05 04:46:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 04:46:56,666 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 04:46:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:56,666 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 04:46:56,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 04:46:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:56,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:56,666 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:56,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6207,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:56,867 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2048740852, now seen corresponding path program 158 times [2021-06-05 04:46:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:56,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757480417] [2021-06-05 04:46:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757480417] [2021-06-05 04:46:56,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757480417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267436664] [2021-06-05 04:46:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267436664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:57,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:46:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633480092] [2021-06-05 04:46:57,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:57,202 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:57,533 INFO L93 Difference]: Finished difference Result 114 states and 217 transitions. [2021-06-05 04:46:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:57,534 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:46:57,534 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:46:57,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:46:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-06-05 04:46:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:46:57,535 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:46:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:57,535 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:46:57,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:46:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:57,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:57,535 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:57,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6211 [2021-06-05 04:46:57,736 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1096274995, now seen corresponding path program 159 times [2021-06-05 04:46:57,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:57,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892618406] [2021-06-05 04:46:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892618406] [2021-06-05 04:46:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892618406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45440033] [2021-06-05 04:46:57,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:57,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45440033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:57,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:57,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206590589] [2021-06-05 04:46:57,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:57,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:57,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:57,911 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:58,027 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-06-05 04:46:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:58,028 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:46:58,028 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:46:58,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:46:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 04:46:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:46:58,029 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:46:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:58,029 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:46:58,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:46:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:58,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:58,030 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:58,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6234 [2021-06-05 04:46:58,230 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1233533912, now seen corresponding path program 160 times [2021-06-05 04:46:58,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:58,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293183719] [2021-06-05 04:46:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:58,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293183719] [2021-06-05 04:46:58,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293183719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458437708] [2021-06-05 04:46:58,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:58,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458437708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:58,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:58,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:46:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268331314] [2021-06-05 04:46:58,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:46:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:46:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:46:58,509 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:58,784 INFO L93 Difference]: Finished difference Result 109 states and 205 transitions. [2021-06-05 04:46:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:58,785 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:46:58,785 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:46:58,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:46:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-06-05 04:46:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 04:46:58,786 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 04:46:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:58,786 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 04:46:58,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 04:46:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:58,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:58,787 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:58,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6238,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:58,987 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash -498938337, now seen corresponding path program 161 times [2021-06-05 04:46:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:58,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775061345] [2021-06-05 04:46:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775061345] [2021-06-05 04:46:59,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775061345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577294116] [2021-06-05 04:46:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:59,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577294116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:59,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:59,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894741209] [2021-06-05 04:46:59,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:59,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:59,140 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:59,246 INFO L93 Difference]: Finished difference Result 119 states and 227 transitions. [2021-06-05 04:46:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:59,247 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:46:59,247 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:46:59,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:46:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2021-06-05 04:46:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:46:59,248 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:46:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:59,248 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:46:59,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:46:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:46:59,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:59,248 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:59,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6249,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:59,461 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -538062648, now seen corresponding path program 162 times [2021-06-05 04:46:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:59,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962852295] [2021-06-05 04:46:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962852295] [2021-06-05 04:46:59,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962852295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266337616] [2021-06-05 04:46:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:59,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:59,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:46:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266337616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:59,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:59,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911401415] [2021-06-05 04:46:59,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:59,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:59,662 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:59,840 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 04:46:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:46:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:59,841 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:46:59,841 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:46:59,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:46:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-06-05 04:46:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2021-06-05 04:46:59,842 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 17 [2021-06-05 04:46:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:59,842 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2021-06-05 04:46:59,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2021-06-05 04:46:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:46:59,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:59,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6253 [2021-06-05 04:47:00,045 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1488406346, now seen corresponding path program 163 times [2021-06-05 04:47:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719966576] [2021-06-05 04:47:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:00,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:00,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719966576] [2021-06-05 04:47:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719966576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:00,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770757597] [2021-06-05 04:47:00,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:00,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:00,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:00,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:00,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:00,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:00,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,927 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 04:47:00,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:00,930 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:00,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:00,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:00,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:00,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:00,990 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:47:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:01,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770757597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:01,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:01,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:47:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114861209] [2021-06-05 04:47:01,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:47:01,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:47:01,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:01,073 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,300 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 04:47:01,587 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 04:47:01,737 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 04:47:01,880 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 04:47:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:01,909 INFO L93 Difference]: Finished difference Result 150 states and 283 transitions. [2021-06-05 04:47:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:01,910 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:47:01,910 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:47:01,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:47:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-06-05 04:47:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 04:47:01,911 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 04:47:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:01,911 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 04:47:01,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 04:47:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:01,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:01,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:02,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6264 [2021-06-05 04:47:02,117 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -857142774, now seen corresponding path program 164 times [2021-06-05 04:47:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:02,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911238667] [2021-06-05 04:47:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:02,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:02,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911238667] [2021-06-05 04:47:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911238667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:02,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207007755] [2021-06-05 04:47:02,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:02,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:02,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:02,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:02,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:02,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:02,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:02,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:02,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:47:02,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:02,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:02,999 INFO L628 ElimStorePlain]: treesize reduction 123, result has 32.4 percent of original size [2021-06-05 04:47:03,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:03,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:03,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:03,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:03,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:03,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:03,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:03,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:03,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:03,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:03,060 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:47:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207007755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:03,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:47:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171914920] [2021-06-05 04:47:03,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:47:03,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:47:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:03,134 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:03,532 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 04:47:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:04,387 INFO L93 Difference]: Finished difference Result 178 states and 345 transitions. [2021-06-05 04:47:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:47:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:04,387 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:47:04,387 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:47:04,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1449.5ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:47:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:47:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 84. [2021-06-05 04:47:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 04:47:04,389 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 04:47:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:04,389 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 04:47:04,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 04:47:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:04,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:04,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:04,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6418 [2021-06-05 04:47:04,590 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash 48811164, now seen corresponding path program 165 times [2021-06-05 04:47:04,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:04,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196711619] [2021-06-05 04:47:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:04,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:04,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196711619] [2021-06-05 04:47:04,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196711619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:04,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644687078] [2021-06-05 04:47:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:04,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:05,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:05,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:05,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:05,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:05,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:05,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:05,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:05,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,553 INFO L628 ElimStorePlain]: treesize reduction 160, result has 26.6 percent of original size [2021-06-05 04:47:05,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:05,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:05,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:05,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:05,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:05,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:05,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:05,617 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 04:47:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644687078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:05,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:05,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54616907] [2021-06-05 04:47:05,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:05,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:05,688 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:06,189 INFO L93 Difference]: Finished difference Result 136 states and 268 transitions. [2021-06-05 04:47:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:06,189 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:47:06,189 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:47:06,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:47:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2021-06-05 04:47:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 85 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2021-06-05 04:47:06,191 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 18 [2021-06-05 04:47:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:06,191 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2021-06-05 04:47:06,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2021-06-05 04:47:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:06,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:06,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:06,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6518,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:06,391 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash -982261800, now seen corresponding path program 166 times [2021-06-05 04:47:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:06,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135346482] [2021-06-05 04:47:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:06,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135346482] [2021-06-05 04:47:06,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135346482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841109122] [2021-06-05 04:47:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:06,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:06,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:07,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:47:07,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:07,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:07,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:07,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:07,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:07,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,312 INFO L628 ElimStorePlain]: treesize reduction 172, result has 26.2 percent of original size [2021-06-05 04:47:07,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:07,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:07,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:07,337 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:07,357 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:07,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:07,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:07,374 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:387, output treesize:46 [2021-06-05 04:47:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:07,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841109122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:07,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:07,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:07,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055792993] [2021-06-05 04:47:07,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:07,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:07,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:07,446 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:07,823 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 04:47:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:47:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:07,824 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:47:07,824 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:47:07,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 639.0ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:47:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 04:47:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-06-05 04:47:07,825 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 18 [2021-06-05 04:47:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:07,825 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-06-05 04:47:07,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-06-05 04:47:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:07,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:07,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:08,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6665,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:08,026 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1339782428, now seen corresponding path program 167 times [2021-06-05 04:47:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:08,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617925734] [2021-06-05 04:47:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:08,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:08,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617925734] [2021-06-05 04:47:08,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617925734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:08,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635319534] [2021-06-05 04:47:08,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:08,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:08,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:08,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:08,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:08,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:08,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:08,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,859 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 04:47:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:08,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:08,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:08,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:08,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:08,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:08,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:08,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:08,921 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:47:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:08,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635319534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:08,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:08,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619238301] [2021-06-05 04:47:08,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:08,993 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:09,384 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 04:47:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:09,385 INFO L225 Difference]: With dead ends: 130 [2021-06-05 04:47:09,385 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:47:09,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:47:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-06-05 04:47:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.045977011494253) internal successors, (178), 87 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2021-06-05 04:47:09,386 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 18 [2021-06-05 04:47:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:09,386 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2021-06-05 04:47:09,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2021-06-05 04:47:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:09,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:09,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:09,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6810,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:09,587 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:09,587 INFO L82 PathProgramCache]: Analyzing trace with hash 860497752, now seen corresponding path program 168 times [2021-06-05 04:47:09,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:09,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163262718] [2021-06-05 04:47:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:09,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163262718] [2021-06-05 04:47:09,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163262718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:09,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560629421] [2021-06-05 04:47:09,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:09,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:09,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:10,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:10,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:47:10,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:10,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:10,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:10,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,659 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 04:47:10,660 INFO L628 ElimStorePlain]: treesize reduction 491, result has 19.4 percent of original size [2021-06-05 04:47:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:10,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:10,709 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:10,752 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:10,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:10,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:10,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:10,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:10,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:10,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:10,948 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 04:47:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:11,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560629421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:11,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:11,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422156875] [2021-06-05 04:47:11,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:11,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:11,074 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:11,518 INFO L93 Difference]: Finished difference Result 148 states and 280 transitions. [2021-06-05 04:47:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:11,518 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:47:11,518 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:47:11,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:47:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2021-06-05 04:47:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-06-05 04:47:11,520 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 18 [2021-06-05 04:47:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:11,520 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-06-05 04:47:11,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-06-05 04:47:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:11,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:11,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:11,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6903 [2021-06-05 04:47:11,720 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash 57973998, now seen corresponding path program 169 times [2021-06-05 04:47:11,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:11,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4073711] [2021-06-05 04:47:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:11,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4073711] [2021-06-05 04:47:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4073711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904478278] [2021-06-05 04:47:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:12,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:12,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:12,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:12,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:12,619 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:12,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:12,624 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:12,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,677 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:12,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:12,681 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:12,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:12,686 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:12,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:12,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:12,708 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:12,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904478278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:12,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:12,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168693471] [2021-06-05 04:47:12,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:12,781 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:13,242 INFO L93 Difference]: Finished difference Result 138 states and 274 transitions. [2021-06-05 04:47:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:47:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:13,243 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:47:13,243 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:47:13,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:47:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-06-05 04:47:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.065934065934066) internal successors, (188), 91 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 188 transitions. [2021-06-05 04:47:13,244 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 188 transitions. Word has length 18 [2021-06-05 04:47:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:13,244 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 188 transitions. [2021-06-05 04:47:13,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 188 transitions. [2021-06-05 04:47:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:13,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:13,244 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:13,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7013 [2021-06-05 04:47:13,445 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1914949070, now seen corresponding path program 170 times [2021-06-05 04:47:13,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:13,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119463579] [2021-06-05 04:47:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:13,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119463579] [2021-06-05 04:47:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119463579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385492084] [2021-06-05 04:47:13,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:13,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:14,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:14,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:14,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,285 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:14,289 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:14,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:14,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,301 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:14,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,355 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:14,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:14,359 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:14,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:14,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:14,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:14,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:14,387 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385492084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:14,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:14,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:14,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305238565] [2021-06-05 04:47:14,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:14,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:14,459 INFO L87 Difference]: Start difference. First operand 92 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:14,844 INFO L93 Difference]: Finished difference Result 135 states and 268 transitions. [2021-06-05 04:47:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:14,845 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:47:14,845 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:47:14,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:47:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2021-06-05 04:47:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-06-05 04:47:14,846 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 18 [2021-06-05 04:47:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:14,846 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-06-05 04:47:14,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-06-05 04:47:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:14,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:14,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:15,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7187 [2021-06-05 04:47:15,047 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1900733550, now seen corresponding path program 171 times [2021-06-05 04:47:15,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:15,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847410140] [2021-06-05 04:47:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:15,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:15,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847410140] [2021-06-05 04:47:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847410140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:15,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368285635] [2021-06-05 04:47:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:15,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:16,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:16,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:16,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:16,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:47:16,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:16,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:16,151 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,155 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:16,160 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:16,169 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:16,174 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:16,178 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:16,182 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,305 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 04:47:16,306 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 04:47:16,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:16,310 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:16,313 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:16,317 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:16,320 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:16,324 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:16,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:16,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:16,375 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:47:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:16,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368285635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:16,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:16,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:16,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87832451] [2021-06-05 04:47:16,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:16,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:16,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:16,550 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:17,062 INFO L93 Difference]: Finished difference Result 153 states and 292 transitions. [2021-06-05 04:47:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:17,063 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:47:17,063 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:47:17,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 690.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:47:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2021-06-05 04:47:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.066666666666667) internal successors, (186), 90 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 186 transitions. [2021-06-05 04:47:17,065 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 186 transitions. Word has length 18 [2021-06-05 04:47:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:17,065 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 186 transitions. [2021-06-05 04:47:17,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 186 transitions. [2021-06-05 04:47:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:17,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:17,065 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:17,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7319,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:17,266 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:17,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:17,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1327203748, now seen corresponding path program 172 times [2021-06-05 04:47:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:17,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936450144] [2021-06-05 04:47:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:17,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936450144] [2021-06-05 04:47:17,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936450144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606576529] [2021-06-05 04:47:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:17,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:17,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:17,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:17,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:17,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:17,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:17,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:17,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:17,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:17,826 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:17,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:17,846 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:47:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606576529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:17,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:17,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:17,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423191481] [2021-06-05 04:47:17,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:17,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:17,916 INFO L87 Difference]: Start difference. First operand 91 states and 186 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:18,101 INFO L93 Difference]: Finished difference Result 127 states and 248 transitions. [2021-06-05 04:47:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:18,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:18,102 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:47:18,102 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:47:18,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:47:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-06-05 04:47:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-06-05 04:47:18,103 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 18 [2021-06-05 04:47:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:18,103 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-06-05 04:47:18,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-06-05 04:47:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:18,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:18,104 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:18,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7478 [2021-06-05 04:47:18,313 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1806488424, now seen corresponding path program 173 times [2021-06-05 04:47:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:18,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074107055] [2021-06-05 04:47:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:18,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074107055] [2021-06-05 04:47:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074107055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40352023] [2021-06-05 04:47:18,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:18,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:47:18,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:18,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:18,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:18,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:18,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:18,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:18,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:18,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:18,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:18,743 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:18,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:18,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:18,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:18,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:18,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:18,803 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:47:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:18,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40352023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:18,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:18,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:18,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16541513] [2021-06-05 04:47:18,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:18,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:18,966 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:19,340 INFO L93 Difference]: Finished difference Result 134 states and 266 transitions. [2021-06-05 04:47:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:19,341 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:47:19,341 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:47:19,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:47:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 04:47:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 93 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 192 transitions. [2021-06-05 04:47:19,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 192 transitions. Word has length 18 [2021-06-05 04:47:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:19,342 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 192 transitions. [2021-06-05 04:47:19,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 192 transitions. [2021-06-05 04:47:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:19,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:19,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:19,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7519,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:19,543 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1953249070, now seen corresponding path program 174 times [2021-06-05 04:47:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:19,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753101874] [2021-06-05 04:47:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:19,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:19,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753101874] [2021-06-05 04:47:19,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753101874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:19,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431761091] [2021-06-05 04:47:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:19,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:47:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:19,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:19,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:19,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:19,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:19,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:19,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:20,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:20,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:20,021 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:20,024 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:20,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:20,031 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:20,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:20,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:20,076 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:47:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:20,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431761091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:20,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:20,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:20,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083010185] [2021-06-05 04:47:20,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:20,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:20,231 INFO L87 Difference]: Start difference. First operand 94 states and 192 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:20,412 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 04:47:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:20,413 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:47:20,413 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:47:20,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:47:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 04:47:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 195 transitions. [2021-06-05 04:47:20,414 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 195 transitions. Word has length 18 [2021-06-05 04:47:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:20,414 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 195 transitions. [2021-06-05 04:47:20,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 195 transitions. [2021-06-05 04:47:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:20,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:20,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:20,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7546,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:20,615 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1931387830, now seen corresponding path program 175 times [2021-06-05 04:47:20,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:20,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760420100] [2021-06-05 04:47:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:20,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:20,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760420100] [2021-06-05 04:47:20,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760420100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:20,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098192692] [2021-06-05 04:47:20,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:21,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:21,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:21,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:21,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:21,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:21,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,546 INFO L628 ElimStorePlain]: treesize reduction 138, result has 31.0 percent of original size [2021-06-05 04:47:21,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:21,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:21,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:21,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:21,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:21,610 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 04:47:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098192692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:21,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:21,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754133730] [2021-06-05 04:47:21,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:21,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:21,682 INFO L87 Difference]: Start difference. First operand 95 states and 195 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:21,969 INFO L93 Difference]: Finished difference Result 122 states and 239 transitions. [2021-06-05 04:47:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:21,970 INFO L225 Difference]: With dead ends: 122 [2021-06-05 04:47:21,970 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:47:21,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:47:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2021-06-05 04:47:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-06-05 04:47:21,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-06-05 04:47:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:21,971 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-06-05 04:47:21,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-06-05 04:47:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:21,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:21,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:22,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7576 [2021-06-05 04:47:22,172 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1332506502, now seen corresponding path program 176 times [2021-06-05 04:47:22,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:22,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503107773] [2021-06-05 04:47:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:22,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503107773] [2021-06-05 04:47:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503107773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754387809] [2021-06-05 04:47:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:22,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:22,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:22,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:22,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:47:22,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:22,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:22,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:22,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:22,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:22,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:22,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:22,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:22,970 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 04:47:22,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:22,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:22,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:22,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:22,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:23,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:23,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:23,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:23,033 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:47:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754387809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:23,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965564245] [2021-06-05 04:47:23,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:23,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:23,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:23,104 INFO L87 Difference]: Start difference. First operand 97 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:23,437 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:47:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:23,561 INFO L93 Difference]: Finished difference Result 125 states and 251 transitions. [2021-06-05 04:47:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:23,562 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:47:23,562 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:47:23,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:47:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-06-05 04:47:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-06-05 04:47:23,563 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-06-05 04:47:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:23,563 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-06-05 04:47:23,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-06-05 04:47:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:23,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:23,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:23,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7702,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:23,769 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -640416566, now seen corresponding path program 177 times [2021-06-05 04:47:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:23,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635098597] [2021-06-05 04:47:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:23,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635098597] [2021-06-05 04:47:23,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635098597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457367021] [2021-06-05 04:47:23,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:23,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:24,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:24,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:24,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:24,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:24,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,679 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 04:47:24,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:24,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:24,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:24,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:24,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:24,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:24,755 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:47:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:24,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457367021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:24,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:24,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:24,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507406393] [2021-06-05 04:47:24,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:24,832 INFO L87 Difference]: Start difference. First operand 98 states and 201 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:25,159 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-06-05 04:47:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:25,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:25,160 INFO L225 Difference]: With dead ends: 122 [2021-06-05 04:47:25,160 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:47:25,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:47:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-06-05 04:47:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 04:47:25,161 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 04:47:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:25,161 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 04:47:25,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 04:47:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:25,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:25,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:25,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7797 [2021-06-05 04:47:25,362 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:25,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:25,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1119701242, now seen corresponding path program 178 times [2021-06-05 04:47:25,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:25,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525946932] [2021-06-05 04:47:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:25,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525946932] [2021-06-05 04:47:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525946932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769374381] [2021-06-05 04:47:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:25,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:25,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:25,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:26,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:26,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:26,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:26,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:26,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:26,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,507 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 04:47:26,507 INFO L628 ElimStorePlain]: treesize reduction 356, result has 24.7 percent of original size [2021-06-05 04:47:26,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:26,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:26,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:26,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:26,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:26,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:26,729 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:26,767 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:26,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:26,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:26,801 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 04:47:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769374381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:26,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:26,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580975156] [2021-06-05 04:47:26,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:26,926 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:27,331 INFO L93 Difference]: Finished difference Result 121 states and 243 transitions. [2021-06-05 04:47:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:27,332 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:47:27,332 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:47:27,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:47:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-06-05 04:47:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-06-05 04:47:27,333 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-06-05 04:47:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:27,333 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-06-05 04:47:27,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-06-05 04:47:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:27,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:27,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7893 [2021-06-05 04:47:27,541 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1922224996, now seen corresponding path program 179 times [2021-06-05 04:47:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:27,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254097095] [2021-06-05 04:47:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:27,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254097095] [2021-06-05 04:47:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254097095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871969236] [2021-06-05 04:47:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:27,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:27,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:27,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:28,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:28,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:28,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:28,337 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:28,341 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,345 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:28,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,356 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:28,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,411 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:28,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:28,415 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:28,418 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:28,421 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:28,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:28,448 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:28,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871969236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:28,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:28,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914172543] [2021-06-05 04:47:28,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:28,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:28,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:28,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:28,522 INFO L87 Difference]: Start difference. First operand 98 states and 201 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,861 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:47:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:28,984 INFO L93 Difference]: Finished difference Result 127 states and 255 transitions. [2021-06-05 04:47:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:28,985 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:47:28,985 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:47:28,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:47:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2021-06-05 04:47:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-06-05 04:47:28,986 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-06-05 04:47:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:28,986 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-06-05 04:47:28,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-06-05 04:47:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:28,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:28,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:29,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8093,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:29,187 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash 399819232, now seen corresponding path program 180 times [2021-06-05 04:47:29,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:29,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248724359] [2021-06-05 04:47:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:29,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248724359] [2021-06-05 04:47:29,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248724359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839681777] [2021-06-05 04:47:29,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:29,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:30,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:30,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:30,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:30,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:30,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:30,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,072 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,079 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,082 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,133 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:30,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:30,140 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:30,143 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:30,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:30,164 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839681777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:30,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:30,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:30,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669962450] [2021-06-05 04:47:30,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:30,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:30,239 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,511 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:47:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:30,536 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-06-05 04:47:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:30,537 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:47:30,537 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:47:30,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:47:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-06-05 04:47:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-06-05 04:47:30,538 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-06-05 04:47:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:30,538 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-06-05 04:47:30,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-06-05 04:47:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:30,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:30,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:30,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8239,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:30,739 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:30,739 INFO L82 PathProgramCache]: Analyzing trace with hash -79465444, now seen corresponding path program 181 times [2021-06-05 04:47:30,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:30,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671345969] [2021-06-05 04:47:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:31,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671345969] [2021-06-05 04:47:31,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671345969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245948285] [2021-06-05 04:47:31,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:31,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:31,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:31,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:31,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:31,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:31,856 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:31,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,869 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,875 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:31,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:31,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,887 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,893 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:31,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:31,898 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,009 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 04:47:32,009 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:47:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:32,013 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:32,017 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:32,020 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:32,023 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:32,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:32,062 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:47:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:32,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245948285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:32,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:32,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32895396] [2021-06-05 04:47:32,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:32,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:32,195 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:32,636 INFO L93 Difference]: Finished difference Result 142 states and 273 transitions. [2021-06-05 04:47:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:32,637 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:47:32,637 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:47:32,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:47:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-06-05 04:47:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 04:47:32,638 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 04:47:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:32,638 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 04:47:32,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 04:47:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:32,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:32,639 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:32,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8388 [2021-06-05 04:47:32,839 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 987564554, now seen corresponding path program 182 times [2021-06-05 04:47:32,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:32,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843778646] [2021-06-05 04:47:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:32,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843778646] [2021-06-05 04:47:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843778646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896928376] [2021-06-05 04:47:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:33,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:33,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:33,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:33,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:33,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:33,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:33,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:33,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:33,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:33,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:33,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:33,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:33,325 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:47:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:33,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896928376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:33,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:33,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:33,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833791683] [2021-06-05 04:47:33,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:33,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:33,408 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:33,874 INFO L93 Difference]: Finished difference Result 127 states and 254 transitions. [2021-06-05 04:47:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:33,875 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:47:33,875 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:47:33,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:47:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-06-05 04:47:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-06-05 04:47:33,876 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-06-05 04:47:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:33,876 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-06-05 04:47:33,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-06-05 04:47:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:33,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:33,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:34,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8460 [2021-06-05 04:47:34,077 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash 508279878, now seen corresponding path program 183 times [2021-06-05 04:47:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:34,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598887312] [2021-06-05 04:47:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:34,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:34,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598887312] [2021-06-05 04:47:34,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598887312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405999094] [2021-06-05 04:47:34,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:34,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:47:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:34,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:34,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:34,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:34,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:34,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:34,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:34,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:34,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:34,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:34,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:34,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:34,594 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:47:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405999094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:34,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:34,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27115743] [2021-06-05 04:47:34,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:34,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:34,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:34,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:34,719 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:34,941 INFO L93 Difference]: Finished difference Result 116 states and 230 transitions. [2021-06-05 04:47:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:34,942 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:47:34,942 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:47:34,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:47:34,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-06-05 04:47:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-06-05 04:47:34,943 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-06-05 04:47:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:34,943 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-06-05 04:47:34,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-06-05 04:47:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:34,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:34,943 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:35,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8494 [2021-06-05 04:47:35,144 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash -26949924, now seen corresponding path program 184 times [2021-06-05 04:47:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:35,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155991017] [2021-06-05 04:47:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:35,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:35,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155991017] [2021-06-05 04:47:35,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155991017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113002512] [2021-06-05 04:47:35,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:35,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:35,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:35,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:35,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:35,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:35,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:35,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:35,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:35,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:35,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:35,633 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:35,636 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:35,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:35,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:35,683 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113002512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:35,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:35,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319178253] [2021-06-05 04:47:35,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:35,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:35,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:35,858 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:36,652 INFO L93 Difference]: Finished difference Result 174 states and 334 transitions. [2021-06-05 04:47:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:36,653 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:47:36,653 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:47:36,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:47:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 103. [2021-06-05 04:47:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 04:47:36,654 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 04:47:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:36,654 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 04:47:36,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 04:47:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:36,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:36,654 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:36,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8517 [2021-06-05 04:47:36,855 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash 260313670, now seen corresponding path program 185 times [2021-06-05 04:47:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:36,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506792418] [2021-06-05 04:47:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506792418] [2021-06-05 04:47:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506792418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179359411] [2021-06-05 04:47:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:37,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:37,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:37,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:37,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:37,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:37,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:37,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,614 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:37,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:37,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:37,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:37,629 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,680 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:37,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:37,683 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:37,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:37,689 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:37,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:37,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:37,711 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:37,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179359411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:37,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:37,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784266093] [2021-06-05 04:47:37,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:37,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:37,785 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,079 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:47:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:38,112 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 04:47:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:38,113 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:47:38,113 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:47:38,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:47:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-06-05 04:47:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 103 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 216 transitions. [2021-06-05 04:47:38,114 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 216 transitions. Word has length 18 [2021-06-05 04:47:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:38,114 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 216 transitions. [2021-06-05 04:47:38,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 216 transitions. [2021-06-05 04:47:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:38,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:38,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:38,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8545 [2021-06-05 04:47:38,317 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1712609398, now seen corresponding path program 186 times [2021-06-05 04:47:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:38,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475477066] [2021-06-05 04:47:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:38,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475477066] [2021-06-05 04:47:38,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475477066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561906250] [2021-06-05 04:47:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:38,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:47:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:39,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:47:39,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:39,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:39,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:39,197 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,200 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:39,205 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:39,209 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:39,212 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,263 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:39,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:39,267 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:39,270 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:39,273 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:39,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:39,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:39,294 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:47:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:39,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561906250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:39,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:39,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:39,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808763044] [2021-06-05 04:47:39,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:39,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:39,369 INFO L87 Difference]: Start difference. First operand 104 states and 216 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,699 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:47:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:39,777 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-06-05 04:47:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:39,778 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:47:39,778 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:47:39,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:47:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-06-05 04:47:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 218 transitions. [2021-06-05 04:47:39,780 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 218 transitions. Word has length 18 [2021-06-05 04:47:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:39,780 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 218 transitions. [2021-06-05 04:47:39,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 218 transitions. [2021-06-05 04:47:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:39,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:39,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:39,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8619,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:39,985 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2103073222, now seen corresponding path program 187 times [2021-06-05 04:47:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:39,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844902441] [2021-06-05 04:47:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:40,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844902441] [2021-06-05 04:47:40,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844902441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962437278] [2021-06-05 04:47:40,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:40,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:40,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:40,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:40,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:40,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:40,919 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:40,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:40,934 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:40,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,947 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,951 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:41,042 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:47:41,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:41,046 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:41,058 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:41,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:41,062 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:41,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:41,065 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:41,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:41,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:41,104 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:47:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962437278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:41,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:41,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:41,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088305382] [2021-06-05 04:47:41,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:41,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:41,231 INFO L87 Difference]: Start difference. First operand 105 states and 218 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:41,435 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-06-05 04:47:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:41,436 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:47:41,436 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:47:41,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:47:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-06-05 04:47:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 04:47:41,437 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 04:47:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:41,437 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 04:47:41,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 04:47:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:41,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:41,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:41,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8758,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:41,641 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1124864076, now seen corresponding path program 188 times [2021-06-05 04:47:41,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:41,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395935149] [2021-06-05 04:47:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:41,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395935149] [2021-06-05 04:47:41,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395935149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049285067] [2021-06-05 04:47:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:41,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:42,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:42,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:42,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:42,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:42,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:42,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:42,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:42,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:42,135 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:47:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:42,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049285067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:42,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:42,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950842487] [2021-06-05 04:47:42,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:42,217 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:42,390 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-06-05 04:47:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:42,390 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:47:42,390 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:47:42,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:47:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-06-05 04:47:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 103 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 216 transitions. [2021-06-05 04:47:42,391 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 216 transitions. Word has length 18 [2021-06-05 04:47:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:42,392 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 216 transitions. [2021-06-05 04:47:42,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 216 transitions. [2021-06-05 04:47:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:42,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:42,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8842,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:42,592 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1604148752, now seen corresponding path program 189 times [2021-06-05 04:47:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:42,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570123953] [2021-06-05 04:47:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:42,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570123953] [2021-06-05 04:47:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570123953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141431385] [2021-06-05 04:47:42,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:42,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:47:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:42,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:42,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:42,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:42,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:42,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:42,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:43,045 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:43,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:43,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:43,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:43,058 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:43,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:43,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:43,105 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:47:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:43,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141431385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:43,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339493061] [2021-06-05 04:47:43,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:43,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:43,269 INFO L87 Difference]: Start difference. First operand 104 states and 216 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:43,468 INFO L93 Difference]: Finished difference Result 119 states and 239 transitions. [2021-06-05 04:47:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:43,469 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:47:43,469 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:47:43,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:47:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-06-05 04:47:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 04:47:43,470 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 04:47:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:43,470 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 04:47:43,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 04:47:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:43,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:43,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:43,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8868 [2021-06-05 04:47:43,693 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2139378554, now seen corresponding path program 190 times [2021-06-05 04:47:43,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:43,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575687890] [2021-06-05 04:47:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:43,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:43,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575687890] [2021-06-05 04:47:43,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575687890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288273955] [2021-06-05 04:47:43,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:43,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:44,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:44,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:44,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:44,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:44,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:44,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:44,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:44,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:44,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:44,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:44,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:44,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:44,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:44,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:44,241 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:47:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288273955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:44,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:44,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:44,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118418397] [2021-06-05 04:47:44,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:44,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:44,407 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:44,870 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2021-06-05 04:47:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:47:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:44,871 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:47:44,871 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:47:44,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:47:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-06-05 04:47:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 04:47:44,872 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 04:47:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:44,872 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 04:47:44,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 04:47:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:44,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:44,873 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8893,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,073 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2107431601, now seen corresponding path program 191 times [2021-06-05 04:47:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289371139] [2021-06-05 04:47:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289371139] [2021-06-05 04:47:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289371139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698321241] [2021-06-05 04:47:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:45,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:47:45,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:45,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:45,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,452 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 04:47:45,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:45,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:45,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:45,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:45,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:45,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:45,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:45,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:47:45,662 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:47:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698321241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:45,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:47:45,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817566196] [2021-06-05 04:47:45,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:45,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:45,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:45,689 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,848 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2021-06-05 04:47:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:45,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,849 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:47:45,849 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:47:45,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:47:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-06-05 04:47:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.08) internal successors, (208), 100 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 208 transitions. [2021-06-05 04:47:45,850 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 208 transitions. Word has length 18 [2021-06-05 04:47:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,850 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 208 transitions. [2021-06-05 04:47:45,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 208 transitions. [2021-06-05 04:47:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:45,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:46,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8930,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:46,051 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash -84628278, now seen corresponding path program 192 times [2021-06-05 04:47:46,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:46,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389966861] [2021-06-05 04:47:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389966861] [2021-06-05 04:47:46,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389966861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730554821] [2021-06-05 04:47:46,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:46,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:46,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:46,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:46,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:46,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:46,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:46,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:46,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:46,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:46,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:46,566 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:47:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730554821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:46,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:46,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440544312] [2021-06-05 04:47:46,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:46,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:46,642 INFO L87 Difference]: Start difference. First operand 101 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:46,945 INFO L93 Difference]: Finished difference Result 127 states and 256 transitions. [2021-06-05 04:47:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:46,946 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:47:46,946 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:47:46,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:47:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-06-05 04:47:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 103 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 214 transitions. [2021-06-05 04:47:46,948 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 214 transitions. Word has length 18 [2021-06-05 04:47:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:46,948 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 214 transitions. [2021-06-05 04:47:46,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 214 transitions. [2021-06-05 04:47:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:46,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:46,948 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:47,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8952 [2021-06-05 04:47:47,153 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -563912954, now seen corresponding path program 193 times [2021-06-05 04:47:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:47,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580126768] [2021-06-05 04:47:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:47,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:47,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580126768] [2021-06-05 04:47:47,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580126768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003506328] [2021-06-05 04:47:47,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:47,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:47,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:47,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:47,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:47,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:47,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:47,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:47,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:47,606 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:47,609 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:47,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:47,648 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:167, output treesize:79 [2021-06-05 04:47:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003506328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:47,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:47,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699763990] [2021-06-05 04:47:47,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:47,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:47,774 INFO L87 Difference]: Start difference. First operand 104 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:48,150 INFO L93 Difference]: Finished difference Result 145 states and 280 transitions. [2021-06-05 04:47:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:48,150 INFO L225 Difference]: With dead ends: 145 [2021-06-05 04:47:48,150 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:47:48,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:47:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2021-06-05 04:47:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 04:47:48,152 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 04:47:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:48,152 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 04:47:48,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 04:47:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:48,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:48,152 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:48,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8988,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:48,353 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1099142756, now seen corresponding path program 194 times [2021-06-05 04:47:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277707329] [2021-06-05 04:47:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:48,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277707329] [2021-06-05 04:47:48,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277707329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892370622] [2021-06-05 04:47:48,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:48,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:48,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:48,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:48,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:48,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:48,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:48,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:48,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,965 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 04:47:48,965 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-06-05 04:47:48,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:48,972 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:48,976 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,979 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:48,982 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:48,986 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:47:49,050 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 04:47:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892370622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:49,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:47:49,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558261508] [2021-06-05 04:47:49,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:49,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:49,214 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:49,409 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-06-05 04:47:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:49,409 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:47:49,409 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:47:49,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:47:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-05 04:47:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 04:47:49,410 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 04:47:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:49,411 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 04:47:49,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 04:47:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:49,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:49,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:49,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9018 [2021-06-05 04:47:49,611 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash -511397434, now seen corresponding path program 195 times [2021-06-05 04:47:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:49,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695295292] [2021-06-05 04:47:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695295292] [2021-06-05 04:47:49,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695295292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626721238] [2021-06-05 04:47:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:49,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:49,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:49,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:50,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:50,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:47:50,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:47:50,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:50,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:50,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,880 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:50,886 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,893 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:50,899 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:50,905 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,910 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,915 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:50,921 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:50,926 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:50,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:50,930 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:47:51,071 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:47:51,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:51,075 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:51,079 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:51,083 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:51,087 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:51,090 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:51,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:51,162 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 04:47:51,285 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 04:47:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626721238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:51,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:51,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:47:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444913580] [2021-06-05 04:47:51,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:51,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:51,390 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:52,077 INFO L93 Difference]: Finished difference Result 136 states and 276 transitions. [2021-06-05 04:47:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:52,077 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:47:52,077 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:47:52,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:47:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2021-06-05 04:47:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.087378640776699) internal successors, (215), 103 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 215 transitions. [2021-06-05 04:47:52,079 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 215 transitions. Word has length 18 [2021-06-05 04:47:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:52,079 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 215 transitions. [2021-06-05 04:47:52,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 215 transitions. [2021-06-05 04:47:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:52,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:52,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:52,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9052,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:52,279 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1106952796, now seen corresponding path program 196 times [2021-06-05 04:47:52,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:52,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629971597] [2021-06-05 04:47:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629971597] [2021-06-05 04:47:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629971597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559403120] [2021-06-05 04:47:52,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:52,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:53,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:53,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:53,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:53,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:53,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:53,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:53,182 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,185 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:53,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,240 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:53,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:53,243 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:53,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:53,249 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:53,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:53,271 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:53,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559403120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:53,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:53,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039045600] [2021-06-05 04:47:53,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:53,347 INFO L87 Difference]: Start difference. First operand 104 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,559 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 04:47:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:53,599 INFO L93 Difference]: Finished difference Result 127 states and 251 transitions. [2021-06-05 04:47:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:53,599 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:47:53,599 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:47:53,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:47:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-06-05 04:47:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-06-05 04:47:53,600 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-06-05 04:47:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:53,600 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-06-05 04:47:53,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-06-05 04:47:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:53,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:53,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:53,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9245 [2021-06-05 04:47:53,801 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash 75879832, now seen corresponding path program 197 times [2021-06-05 04:47:53,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:53,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053245667] [2021-06-05 04:47:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053245667] [2021-06-05 04:47:53,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053245667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290148719] [2021-06-05 04:47:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:54,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:54,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:54,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:54,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:54,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:54,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,734 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:54,739 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,742 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,796 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:54,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:54,800 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:54,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:54,806 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:54,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:54,828 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:47:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:54,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290148719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:54,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:54,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:47:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563170419] [2021-06-05 04:47:54,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:47:54,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:47:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:54,906 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:55,142 INFO L93 Difference]: Finished difference Result 125 states and 248 transitions. [2021-06-05 04:47:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:55,143 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:47:55,143 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:47:55,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:47:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-06-05 04:47:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 04:47:55,144 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 04:47:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:55,145 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 04:47:55,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 04:47:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:55,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:55,145 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:55,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9354 [2021-06-05 04:47:55,345 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1897043236, now seen corresponding path program 198 times [2021-06-05 04:47:55,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:55,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161638546] [2021-06-05 04:47:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:55,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:55,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161638546] [2021-06-05 04:47:55,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161638546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739864374] [2021-06-05 04:47:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:55,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:56,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:47:56,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:56,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:56,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:56,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:56,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:56,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,417 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,420 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,424 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:56,430 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:56,434 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,484 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:47:56,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:56,488 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:56,491 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:56,494 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:56,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:56,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:56,515 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:597, output treesize:52 [2021-06-05 04:47:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:56,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739864374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:56,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:56,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046421548] [2021-06-05 04:47:56,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:56,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:56,592 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,895 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:47:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:56,930 INFO L93 Difference]: Finished difference Result 123 states and 245 transitions. [2021-06-05 04:47:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:56,931 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:47:56,931 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:47:56,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:47:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-06-05 04:47:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 04:47:56,932 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 04:47:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:56,932 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 04:47:56,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 04:47:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:56,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:56,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:57,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9446,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:57,133 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1918639384, now seen corresponding path program 199 times [2021-06-05 04:47:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:57,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751942429] [2021-06-05 04:47:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:57,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751942429] [2021-06-05 04:47:57,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751942429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709971018] [2021-06-05 04:47:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:58,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:58,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:58,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:47:58,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:58,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:58,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,205 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,209 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:58,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:58,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:58,226 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,231 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,235 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,238 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:58,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:58,243 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,247 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:58,251 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,342 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:47:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:58,346 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:58,350 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:58,353 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:47:58,357 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:58,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:58,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:58,396 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 5 variables, input treesize:879, output treesize:79 [2021-06-05 04:47:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709971018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:58,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:58,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:47:58,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170078473] [2021-06-05 04:47:58,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:47:58,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:47:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:58,535 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:58,782 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-06-05 04:47:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:58,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:47:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:58,783 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:47:58,783 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:47:58,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:47:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-06-05 04:47:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-06-05 04:47:58,784 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-06-05 04:47:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:58,784 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-06-05 04:47:58,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-06-05 04:47:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:47:58,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:58,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:58,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9625,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:58,985 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:58,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1116115630, now seen corresponding path program 200 times [2021-06-05 04:47:58,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:58,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847763321] [2021-06-05 04:47:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:59,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:59,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847763321] [2021-06-05 04:47:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847763321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479861873] [2021-06-05 04:47:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:59,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:59,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:59,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:47:59,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:47:59,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:47:59,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:59,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,832 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:47:59,836 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:59,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,844 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:59,848 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:47:59,851 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,910 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:47:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:47:59,913 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:47:59,916 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:47:59,919 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:59,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:59,944 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:652, output treesize:62 [2021-06-05 04:48:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479861873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:00,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:00,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126946499] [2021-06-05 04:48:00,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:00,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:00,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:00,027 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,287 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 04:48:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:00,386 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 04:48:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:00,387 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:48:00,387 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:48:00,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:48:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-06-05 04:48:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 04:48:00,388 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 04:48:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:00,388 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 04:48:00,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 04:48:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:00,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:00,388 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:00,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9812,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:00,589 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -856807438, now seen corresponding path program 201 times [2021-06-05 04:48:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:00,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773601212] [2021-06-05 04:48:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:00,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773601212] [2021-06-05 04:48:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773601212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483078443] [2021-06-05 04:48:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:00,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:00,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:01,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:01,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:01,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:01,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:01,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:01,541 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:01,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:01,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:01,547 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,599 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:01,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:01,605 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:01,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:01,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:01,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:01,630 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:48:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:01,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483078443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:01,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:01,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:01,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103816555] [2021-06-05 04:48:01,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:01,702 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:02,060 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 04:48:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:02,061 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:48:02,061 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:48:02,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:48:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-06-05 04:48:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 04:48:02,062 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 04:48:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 04:48:02,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 04:48:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:02,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:02,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:02,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-06-05 04:48:02,277 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1336092114, now seen corresponding path program 202 times [2021-06-05 04:48:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:02,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580413002] [2021-06-05 04:48:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:02,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:02,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580413002] [2021-06-05 04:48:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580413002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:02,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682249162] [2021-06-05 04:48:02,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:02,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:03,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:03,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:03,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:03,401 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:03,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:03,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,423 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:03,428 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:03,432 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:03,437 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:03,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:03,441 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,534 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:48:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:03,538 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:03,542 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:03,546 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:03,549 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:03,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:03,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:03,588 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:48:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:03,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682249162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:03,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:03,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:03,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512912065] [2021-06-05 04:48:03,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:03,723 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:04,099 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 04:48:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:04,099 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:48:04,099 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:48:04,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:48:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-06-05 04:48:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-06-05 04:48:04,101 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-06-05 04:48:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:04,101 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-06-05 04:48:04,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-06-05 04:48:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:04,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:04,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:04,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10127,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:04,301 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -269062116, now seen corresponding path program 203 times [2021-06-05 04:48:04,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:04,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162387939] [2021-06-05 04:48:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:04,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162387939] [2021-06-05 04:48:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162387939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307216366] [2021-06-05 04:48:04,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:04,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:48:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:04,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:04,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:04,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:04,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:04,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:04,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:04,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:04,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:04,760 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 04:48:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:04,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307216366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:04,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:04,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:04,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94832631] [2021-06-05 04:48:04,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:04,844 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:05,110 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 04:48:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:05,111 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:48:05,111 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:48:05,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:48:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-06-05 04:48:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 04:48:05,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 04:48:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:05,112 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 04:48:05,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 04:48:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:05,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:05,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:05,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10217,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:05,313 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash -748346792, now seen corresponding path program 204 times [2021-06-05 04:48:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:05,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722492022] [2021-06-05 04:48:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:05,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722492022] [2021-06-05 04:48:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722492022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20781414] [2021-06-05 04:48:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:05,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:48:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:05,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:05,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:05,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:05,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:05,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:05,787 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:05,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:05,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:05,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:05,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:05,836 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:48:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:05,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20781414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:05,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:05,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:05,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674630622] [2021-06-05 04:48:05,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:05,974 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:06,301 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 04:48:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:06,302 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:48:06,302 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:48:06,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:48:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-06-05 04:48:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 04:48:06,303 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 04:48:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:06,303 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 04:48:06,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 04:48:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:06,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:06,303 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:06,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10239,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:06,504 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1283576594, now seen corresponding path program 205 times [2021-06-05 04:48:06,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:06,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789659822] [2021-06-05 04:48:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:06,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789659822] [2021-06-05 04:48:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789659822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243003252] [2021-06-05 04:48:06,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:06,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:06,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:06,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:06,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:06,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:06,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:06,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:06,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:06,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:06,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:07,000 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:07,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:07,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:07,038 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:48:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:07,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243003252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:07,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:07,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:07,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888584112] [2021-06-05 04:48:07,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:07,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:07,167 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:07,821 INFO L93 Difference]: Finished difference Result 181 states and 350 transitions. [2021-06-05 04:48:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:07,822 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:48:07,822 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:48:07,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:48:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:48:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2021-06-05 04:48:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 04:48:07,823 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 04:48:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:07,823 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 04:48:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 04:48:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:07,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:07,824 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:08,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10264 [2021-06-05 04:48:08,037 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -996313000, now seen corresponding path program 206 times [2021-06-05 04:48:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:08,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841423831] [2021-06-05 04:48:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:08,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:08,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841423831] [2021-06-05 04:48:08,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841423831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:08,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304450283] [2021-06-05 04:48:08,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:08,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:08,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:08,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:08,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:08,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,979 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:08,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:08,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:08,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,041 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:09,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:09,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:09,047 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:09,050 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:09,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:09,071 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:48:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:09,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304450283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:09,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:09,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445251818] [2021-06-05 04:48:09,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:09,145 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,449 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 04:48:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:09,551 INFO L93 Difference]: Finished difference Result 137 states and 277 transitions. [2021-06-05 04:48:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:09,552 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:48:09,552 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:48:09,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:48:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-06-05 04:48:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 04:48:09,553 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-06-05 04:48:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:09,553 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 04:48:09,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 04:48:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:09,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:09,553 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:09,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10292 [2021-06-05 04:48:09,754 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1325731228, now seen corresponding path program 207 times [2021-06-05 04:48:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113514137] [2021-06-05 04:48:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113514137] [2021-06-05 04:48:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113514137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182124876] [2021-06-05 04:48:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:09,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:48:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:10,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:10,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:10,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:10,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:10,534 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,537 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:10,540 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:10,544 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,595 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:10,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:10,602 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:10,605 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:10,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:10,626 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:48:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182124876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786297075] [2021-06-05 04:48:10,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:10,698 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:11,088 INFO L93 Difference]: Finished difference Result 135 states and 269 transitions. [2021-06-05 04:48:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:48:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:11,089 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:48:11,089 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:48:11,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:48:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2021-06-05 04:48:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 04:48:11,090 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 18 [2021-06-05 04:48:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:11,090 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 04:48:11,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 04:48:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:11,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:11,090 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:11,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10391,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:11,291 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash 846446552, now seen corresponding path program 208 times [2021-06-05 04:48:11,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:11,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455943657] [2021-06-05 04:48:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:11,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:11,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455943657] [2021-06-05 04:48:11,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455943657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:11,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008951429] [2021-06-05 04:48:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:11,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:11,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:11,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:12,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:12,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:12,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:12,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:48:12,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:12,364 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:12,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:12,375 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,379 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,383 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,387 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:12,393 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:12,397 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,401 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,405 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:12,410 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:12,414 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,548 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 04:48:12,548 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 04:48:12,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:12,552 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:12,555 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:12,559 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:12,563 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:12,566 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:12,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:12,617 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:48:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:12,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008951429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:12,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:12,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190420185] [2021-06-05 04:48:12,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:12,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:12,780 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:13,138 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-05 04:48:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:13,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:13,139 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:48:13,139 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:48:13,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:48:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-06-05 04:48:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 04:48:13,140 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 18 [2021-06-05 04:48:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:13,140 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 04:48:13,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 04:48:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:13,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:13,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:13,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10463 [2021-06-05 04:48:13,341 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1913476550, now seen corresponding path program 209 times [2021-06-05 04:48:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:13,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640618749] [2021-06-05 04:48:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:13,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:13,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640618749] [2021-06-05 04:48:13,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640618749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:13,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48900033] [2021-06-05 04:48:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:13,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:13,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:13,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:13,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:13,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:13,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:13,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:13,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:13,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:13,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:13,840 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:48:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:13,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48900033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:13,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:13,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331363976] [2021-06-05 04:48:13,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:13,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:13,912 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:14,216 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 04:48:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:14,216 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:48:14,216 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:48:14,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:48:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-06-05 04:48:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 04:48:14,217 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 18 [2021-06-05 04:48:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:14,217 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 04:48:14,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 04:48:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:14,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:14,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:14,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10623 [2021-06-05 04:48:14,418 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1434191874, now seen corresponding path program 210 times [2021-06-05 04:48:14,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:14,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487243253] [2021-06-05 04:48:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:14,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487243253] [2021-06-05 04:48:14,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487243253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417804099] [2021-06-05 04:48:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:14,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:48:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:14,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:14,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:14,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:14,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:14,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:14,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:14,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:14,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:14,886 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:14,889 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:14,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:14,938 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:48:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:15,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417804099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:15,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:15,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:15,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760655062] [2021-06-05 04:48:15,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:15,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:15,100 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:15,316 INFO L93 Difference]: Finished difference Result 126 states and 252 transitions. [2021-06-05 04:48:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:15,316 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:48:15,317 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:48:15,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:48:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-06-05 04:48:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 04:48:15,318 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-06-05 04:48:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:15,318 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 04:48:15,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 04:48:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:15,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:15,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:15,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10650,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:15,537 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 898962072, now seen corresponding path program 211 times [2021-06-05 04:48:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:15,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085259440] [2021-06-05 04:48:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085259440] [2021-06-05 04:48:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085259440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168875749] [2021-06-05 04:48:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:15,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:15,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:15,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:15,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:16,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:16,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:16,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:16,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:16,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:16,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:16,088 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:48:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:16,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168875749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:16,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:16,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609851572] [2021-06-05 04:48:16,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:16,219 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:16,823 INFO L93 Difference]: Finished difference Result 165 states and 326 transitions. [2021-06-05 04:48:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:16,824 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:48:16,824 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:48:16,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 769.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:48:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:48:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2021-06-05 04:48:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 04:48:16,826 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-06-05 04:48:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:16,826 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 04:48:16,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 04:48:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:16,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:16,826 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:17,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10682 [2021-06-05 04:48:17,049 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1341254948, now seen corresponding path program 212 times [2021-06-05 04:48:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:17,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707121869] [2021-06-05 04:48:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707121869] [2021-06-05 04:48:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707121869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:17,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278020326] [2021-06-05 04:48:17,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:17,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:17,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:17,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:17,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:17,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:17,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:17,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:17,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:17,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:17,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:17,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 04:48:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:17,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278020326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:17,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:17,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:17,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836390364] [2021-06-05 04:48:17,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:17,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:17,625 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:17,883 INFO L93 Difference]: Finished difference Result 138 states and 280 transitions. [2021-06-05 04:48:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:17,883 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:48:17,883 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:48:17,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:48:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-06-05 04:48:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.087719298245614) internal successors, (238), 114 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 238 transitions. [2021-06-05 04:48:17,885 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 238 transitions. Word has length 18 [2021-06-05 04:48:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:17,885 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 238 transitions. [2021-06-05 04:48:17,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 238 transitions. [2021-06-05 04:48:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:17,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:17,885 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:18,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10711,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:18,085 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1820539624, now seen corresponding path program 213 times [2021-06-05 04:48:18,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:18,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580621947] [2021-06-05 04:48:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:18,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580621947] [2021-06-05 04:48:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580621947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087065080] [2021-06-05 04:48:18,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:18,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:48:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:18,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:18,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:18,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:18,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:18,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:18,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:18,555 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:18,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:18,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:18,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:18,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:18,603 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:48:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:18,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087065080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:18,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:18,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:18,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129923811] [2021-06-05 04:48:18,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:18,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:18,729 INFO L87 Difference]: Start difference. First operand 115 states and 238 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:19,310 INFO L93 Difference]: Finished difference Result 177 states and 347 transitions. [2021-06-05 04:48:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:48:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:19,311 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:48:19,311 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:48:19,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:48:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:48:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-06-05 04:48:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-06-05 04:48:19,313 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 18 [2021-06-05 04:48:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:19,313 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-06-05 04:48:19,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-06-05 04:48:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:19,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:19,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:19,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10737,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:19,514 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1939197870, now seen corresponding path program 214 times [2021-06-05 04:48:19,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:19,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454625612] [2021-06-05 04:48:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:19,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454625612] [2021-06-05 04:48:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454625612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504071740] [2021-06-05 04:48:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:19,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:19,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:19,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:19,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:19,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:19,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:19,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:19,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:19,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:19,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:19,969 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:19,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:19,972 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:20,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:20,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:20,010 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:48:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504071740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:20,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:20,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:20,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568622627] [2021-06-05 04:48:20,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:20,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:20,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:20,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:20,142 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:20,805 INFO L93 Difference]: Finished difference Result 192 states and 375 transitions. [2021-06-05 04:48:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:20,806 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:48:20,806 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:48:20,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 769.3ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:48:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:48:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 117. [2021-06-05 04:48:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-06-05 04:48:20,807 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 18 [2021-06-05 04:48:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:20,807 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-06-05 04:48:20,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-06-05 04:48:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:20,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:20,807 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:21,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10764,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:21,008 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:21,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1768024104, now seen corresponding path program 215 times [2021-06-05 04:48:21,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:21,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785745035] [2021-06-05 04:48:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:21,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:21,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785745035] [2021-06-05 04:48:21,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785745035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:21,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438940902] [2021-06-05 04:48:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:21,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:21,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:21,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:21,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:21,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:21,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:21,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:22,015 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:22,024 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,029 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:22,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:22,038 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:22,042 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,149 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:48:22,149 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:48:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:22,153 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:22,157 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:22,160 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:22,164 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:22,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:22,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:22,209 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:48:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438940902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:22,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:22,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979801502] [2021-06-05 04:48:22,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:22,352 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:23,229 INFO L93 Difference]: Finished difference Result 221 states and 428 transitions. [2021-06-05 04:48:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:23,230 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:48:23,230 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:48:23,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1043.8ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:48:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2021-06-05 04:48:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1333333333333333) internal successors, (256), 120 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 256 transitions. [2021-06-05 04:48:23,232 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 256 transitions. Word has length 18 [2021-06-05 04:48:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:23,232 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 256 transitions. [2021-06-05 04:48:23,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 256 transitions. [2021-06-05 04:48:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:23,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:23,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:23,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10794 [2021-06-05 04:48:23,445 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2057091090, now seen corresponding path program 216 times [2021-06-05 04:48:23,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:23,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037543143] [2021-06-05 04:48:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:23,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037543143] [2021-06-05 04:48:23,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037543143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583595325] [2021-06-05 04:48:23,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:23,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:48:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:24,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:24,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:24,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,246 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:24,250 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:24,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:24,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,263 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:24,270 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,324 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:24,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:24,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:24,331 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:24,333 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:24,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:24,355 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:48:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:24,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583595325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:24,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:24,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836157305] [2021-06-05 04:48:24,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:24,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:24,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:24,428 INFO L87 Difference]: Start difference. First operand 121 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:24,668 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:48:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:24,698 INFO L93 Difference]: Finished difference Result 143 states and 291 transitions. [2021-06-05 04:48:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:24,698 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:48:24,698 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:48:24,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:48:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-06-05 04:48:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 04:48:24,699 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 04:48:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:24,700 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 04:48:24,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 04:48:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:24,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:24,700 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:24,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10977 [2021-06-05 04:48:24,900 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:24,901 INFO L82 PathProgramCache]: Analyzing trace with hash 264953138, now seen corresponding path program 217 times [2021-06-05 04:48:24,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:24,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976700848] [2021-06-05 04:48:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:25,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976700848] [2021-06-05 04:48:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976700848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971862466] [2021-06-05 04:48:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:25,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:25,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:25,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:25,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:25,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:25,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:25,836 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:25,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:25,839 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,890 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:25,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:25,901 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:25,904 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:25,907 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:25,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:25,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:25,928 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:48:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:25,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971862466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:25,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:25,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138750525] [2021-06-05 04:48:25,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:25,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:26,000 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:26,241 INFO L93 Difference]: Finished difference Result 141 states and 288 transitions. [2021-06-05 04:48:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:26,241 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:48:26,241 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:48:26,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:48:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-06-05 04:48:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 04:48:26,242 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 04:48:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:26,243 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 04:48:26,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 04:48:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:26,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:26,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:26,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11082,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:26,443 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -214331538, now seen corresponding path program 218 times [2021-06-05 04:48:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:26,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410382467] [2021-06-05 04:48:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410382467] [2021-06-05 04:48:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410382467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530644693] [2021-06-05 04:48:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:26,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:27,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:27,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:27,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:48:27,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:27,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:27,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:27,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,909 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:27,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,932 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:27,945 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:27,949 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:27,954 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:27,958 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,080 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 04:48:28,080 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 04:48:28,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:28,084 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:28,088 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:28,092 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:28,095 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:28,099 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:28,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:28,150 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:48:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:28,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530644693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:28,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:28,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:28,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678877449] [2021-06-05 04:48:28,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:28,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:28,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:28,311 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:28,522 INFO L93 Difference]: Finished difference Result 141 states and 289 transitions. [2021-06-05 04:48:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:28,523 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:48:28,523 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:48:28,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:48:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-06-05 04:48:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.130081300813008) internal successors, (262), 123 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 262 transitions. [2021-06-05 04:48:28,524 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 262 transitions. Word has length 18 [2021-06-05 04:48:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:28,524 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 262 transitions. [2021-06-05 04:48:28,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 262 transitions. [2021-06-05 04:48:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:28,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:28,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:28,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11174,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:28,725 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash 852698460, now seen corresponding path program 219 times [2021-06-05 04:48:28,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:28,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973422420] [2021-06-05 04:48:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973422420] [2021-06-05 04:48:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973422420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302079983] [2021-06-05 04:48:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:48:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:29,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:29,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:29,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:29,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:29,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:29,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:29,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:29,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:29,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:29,219 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:48:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:29,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302079983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:29,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:29,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:29,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4664285] [2021-06-05 04:48:29,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:29,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:29,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:29,289 INFO L87 Difference]: Start difference. First operand 124 states and 262 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:29,432 INFO L93 Difference]: Finished difference Result 141 states and 288 transitions. [2021-06-05 04:48:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:29,433 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:48:29,433 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:48:29,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:48:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-06-05 04:48:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 04:48:29,434 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 04:48:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:29,434 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 04:48:29,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 04:48:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:29,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:29,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:29,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11356 [2021-06-05 04:48:29,635 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash 373413784, now seen corresponding path program 220 times [2021-06-05 04:48:29,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:29,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82219394] [2021-06-05 04:48:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:29,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82219394] [2021-06-05 04:48:29,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82219394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795825093] [2021-06-05 04:48:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:29,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:29,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:30,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:30,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:30,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:30,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:30,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:30,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:30,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:30,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:30,148 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:30,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:30,188 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:48:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:30,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795825093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:30,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:30,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:30,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250700015] [2021-06-05 04:48:30,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:30,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:30,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:30,314 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:30,609 INFO L93 Difference]: Finished difference Result 167 states and 332 transitions. [2021-06-05 04:48:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:30,609 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:48:30,609 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:48:30,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:48:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2021-06-05 04:48:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 04:48:30,611 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 04:48:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:30,611 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 04:48:30,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 04:48:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:30,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:30,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:30,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11380,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:30,812 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -161816018, now seen corresponding path program 221 times [2021-06-05 04:48:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:30,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952232342] [2021-06-05 04:48:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:31,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952232342] [2021-06-05 04:48:31,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952232342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222219403] [2021-06-05 04:48:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:31,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:48:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:31,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:31,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:31,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:31,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:31,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:31,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:31,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:31,357 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:31,360 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:31,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:31,399 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:48:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:31,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222219403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:31,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:31,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:31,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139139548] [2021-06-05 04:48:31,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:31,524 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:31,722 INFO L93 Difference]: Finished difference Result 145 states and 298 transitions. [2021-06-05 04:48:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:31,723 INFO L225 Difference]: With dead ends: 145 [2021-06-05 04:48:31,723 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:48:31,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:48:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-06-05 04:48:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.130081300813008) internal successors, (262), 123 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 262 transitions. [2021-06-05 04:48:31,724 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 262 transitions. Word has length 18 [2021-06-05 04:48:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:31,724 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 262 transitions. [2021-06-05 04:48:31,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 262 transitions. [2021-06-05 04:48:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:31,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:31,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:31,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11412 [2021-06-05 04:48:31,925 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1892934258, now seen corresponding path program 222 times [2021-06-05 04:48:31,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:31,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386693685] [2021-06-05 04:48:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:32,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386693685] [2021-06-05 04:48:32,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386693685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768203526] [2021-06-05 04:48:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:32,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:48:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:32,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:32,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:32,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:32,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:32,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:32,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:32,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:32,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:32,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:32,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:32,425 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 04:48:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:32,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768203526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:32,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:32,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:32,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425229639] [2021-06-05 04:48:32,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:32,510 INFO L87 Difference]: Start difference. First operand 124 states and 262 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:32,752 INFO L93 Difference]: Finished difference Result 150 states and 310 transitions. [2021-06-05 04:48:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:32,753 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:48:32,753 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:48:32,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:48:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2021-06-05 04:48:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 04:48:32,754 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 04:48:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:32,754 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 04:48:32,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 04:48:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:32,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:32,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:32,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11435,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:32,955 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1413649582, now seen corresponding path program 223 times [2021-06-05 04:48:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:32,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287850710] [2021-06-05 04:48:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:33,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287850710] [2021-06-05 04:48:33,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287850710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628881770] [2021-06-05 04:48:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:33,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:33,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:33,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:33,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:33,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:33,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:33,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:33,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:33,450 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:33,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:33,456 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:33,459 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:33,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:33,508 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:48:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:33,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628881770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:33,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:33,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:33,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036642481] [2021-06-05 04:48:33,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:33,669 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:33,873 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-05 04:48:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:33,874 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:48:33,874 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:48:33,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:48:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-06-05 04:48:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 04:48:33,875 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 04:48:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 04:48:33,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 04:48:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:33,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:33,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:34,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11463 [2021-06-05 04:48:34,076 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash 878419780, now seen corresponding path program 224 times [2021-06-05 04:48:34,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:34,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523007084] [2021-06-05 04:48:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:34,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:34,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523007084] [2021-06-05 04:48:34,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523007084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:34,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025666372] [2021-06-05 04:48:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:34,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:34,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:34,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:34,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:34,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:34,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:34,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:34,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:34,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:34,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:34,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:34,796 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:48:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025666372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:34,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105749884] [2021-06-05 04:48:34,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:34,971 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:35,331 INFO L93 Difference]: Finished difference Result 155 states and 322 transitions. [2021-06-05 04:48:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:35,331 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:48:35,331 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:48:35,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:48:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2021-06-05 04:48:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 04:48:35,333 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 04:48:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:35,333 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 04:48:35,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 04:48:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:35,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:35,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:35,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11487 [2021-06-05 04:48:35,534 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1466165102, now seen corresponding path program 225 times [2021-06-05 04:48:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:35,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039456719] [2021-06-05 04:48:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039456719] [2021-06-05 04:48:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039456719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:35,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498187304] [2021-06-05 04:48:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:35,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:48:35,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:35,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:36,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:36,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:36,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:36,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:36,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:36,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,534 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,543 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,552 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,557 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:36,562 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:36,567 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:36,571 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,679 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 04:48:36,679 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:48:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:36,684 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:36,688 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:36,691 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:36,695 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:36,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:36,740 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:48:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498187304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:36,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:36,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:48:36,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101632258] [2021-06-05 04:48:36,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:36,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:36,911 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:37,758 INFO L93 Difference]: Finished difference Result 229 states and 448 transitions. [2021-06-05 04:48:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:37,759 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:48:37,759 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:48:37,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1037.5ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:48:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:48:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 125. [2021-06-05 04:48:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 04:48:37,761 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 04:48:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 04:48:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 04:48:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:37,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:37,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:37,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11533 [2021-06-05 04:48:37,961 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash -219494372, now seen corresponding path program 226 times [2021-06-05 04:48:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:37,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756846419] [2021-06-05 04:48:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:38,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756846419] [2021-06-05 04:48:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756846419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905626181] [2021-06-05 04:48:38,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:38,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:38,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:38,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:38,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:38,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:38,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:38,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:38,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:38,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:38,470 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:48:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:38,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905626181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:38,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:38,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774524413] [2021-06-05 04:48:38,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:38,541 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:38,711 INFO L93 Difference]: Finished difference Result 144 states and 294 transitions. [2021-06-05 04:48:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:38,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:38,712 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:48:38,712 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:48:38,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:48:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-06-05 04:48:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 272 transitions. [2021-06-05 04:48:38,713 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 272 transitions. Word has length 18 [2021-06-05 04:48:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:38,713 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 272 transitions. [2021-06-05 04:48:38,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 272 transitions. [2021-06-05 04:48:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:38,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:38,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:38,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11717,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:38,914 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -698779048, now seen corresponding path program 227 times [2021-06-05 04:48:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:38,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428337125] [2021-06-05 04:48:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:39,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:39,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428337125] [2021-06-05 04:48:39,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428337125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224647668] [2021-06-05 04:48:39,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:39,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:48:39,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:39,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:39,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:39,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:39,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:39,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:39,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:39,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:39,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:39,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:39,507 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:39,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:39,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:39,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:39,554 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:48:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224647668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:39,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:39,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:39,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325152101] [2021-06-05 04:48:39,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:39,679 INFO L87 Difference]: Start difference. First operand 129 states and 272 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:40,035 INFO L93 Difference]: Finished difference Result 170 states and 338 transitions. [2021-06-05 04:48:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:40,036 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:48:40,036 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:48:40,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:48:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2021-06-05 04:48:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 270 transitions. [2021-06-05 04:48:40,038 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 270 transitions. Word has length 18 [2021-06-05 04:48:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:40,038 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 270 transitions. [2021-06-05 04:48:40,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 270 transitions. [2021-06-05 04:48:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:40,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:40,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11746,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:40,239 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1234008850, now seen corresponding path program 228 times [2021-06-05 04:48:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:40,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674659164] [2021-06-05 04:48:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:40,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:40,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674659164] [2021-06-05 04:48:40,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674659164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:40,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131574612] [2021-06-05 04:48:40,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:40,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:48:40,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:40,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:40,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:40,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:40,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:40,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:40,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:40,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:40,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:40,722 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:40,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:40,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:40,763 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:48:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131574612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:40,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:40,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144651359] [2021-06-05 04:48:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:40,886 INFO L87 Difference]: Start difference. First operand 128 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:41,094 INFO L93 Difference]: Finished difference Result 148 states and 304 transitions. [2021-06-05 04:48:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:41,094 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:48:41,095 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:48:41,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:48:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2021-06-05 04:48:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 04:48:41,096 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 04:48:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:41,097 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 04:48:41,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 04:48:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:41,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:41,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:41,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11775 [2021-06-05 04:48:41,319 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:41,320 INFO L82 PathProgramCache]: Analyzing trace with hash -646263528, now seen corresponding path program 229 times [2021-06-05 04:48:41,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:41,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058722087] [2021-06-05 04:48:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:41,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:41,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058722087] [2021-06-05 04:48:41,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058722087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:41,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226615227] [2021-06-05 04:48:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:41,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:42,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:42,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:42,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:42,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:42,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:42,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:42,379 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:42,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,390 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:42,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:42,395 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,400 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,404 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,413 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,417 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:42,421 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,523 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 04:48:42,524 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:48:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:42,528 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:42,532 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:42,535 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:42,539 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:42,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:42,585 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:48:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:42,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226615227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:42,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:42,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:42,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078540933] [2021-06-05 04:48:42,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:42,728 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:43,265 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 04:48:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:43,523 INFO L93 Difference]: Finished difference Result 231 states and 452 transitions. [2021-06-05 04:48:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:43,524 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:48:43,524 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:48:43,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1029.1ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:48:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2021-06-05 04:48:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 04:48:43,526 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 04:48:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:43,526 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 04:48:43,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 04:48:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:43,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:43,526 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:43,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:43,750 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 393972270, now seen corresponding path program 230 times [2021-06-05 04:48:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:43,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476703248] [2021-06-05 04:48:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:43,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:43,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476703248] [2021-06-05 04:48:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476703248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:43,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996343203] [2021-06-05 04:48:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:44,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:44,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:44,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:44,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:44,665 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:44,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:44,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,690 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:44,695 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:44,700 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,704 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:44,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,713 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,820 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 04:48:44,820 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:48:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:44,824 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:44,828 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:44,831 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:44,835 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:44,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:44,879 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:48:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996343203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:45,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231588819] [2021-06-05 04:48:45,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:45,051 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:45,428 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-06-05 04:48:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:45,429 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:48:45,429 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:48:45,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:48:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2021-06-05 04:48:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 04:48:45,431 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 04:48:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:45,431 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 04:48:45,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 04:48:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:45,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:45,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:45,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11888 [2021-06-05 04:48:45,631 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash 497747466, now seen corresponding path program 231 times [2021-06-05 04:48:45,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:45,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583052495] [2021-06-05 04:48:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:45,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:45,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583052495] [2021-06-05 04:48:45,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583052495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114280092] [2021-06-05 04:48:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:45,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:46,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:46,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:46,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:46,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:46,459 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,466 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,470 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:46,473 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:46,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:46,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:46,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:46,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,536 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:46,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:46,539 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:46,542 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:46,545 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:46,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:46,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:46,567 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:48:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:46,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114280092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:46,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:46,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:46,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556515339] [2021-06-05 04:48:46,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:46,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:46,640 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:46,959 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 04:48:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:47,082 INFO L93 Difference]: Finished difference Result 166 states and 344 transitions. [2021-06-05 04:48:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:48:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:47,083 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:48:47,083 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:48:47,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:48:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:48:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-05 04:48:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 04:48:47,084 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 04:48:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:47,084 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 04:48:47,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 04:48:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:47,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:47,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:47,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12021,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:47,289 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash -533325498, now seen corresponding path program 232 times [2021-06-05 04:48:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:47,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956580210] [2021-06-05 04:48:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:47,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956580210] [2021-06-05 04:48:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956580210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790491212] [2021-06-05 04:48:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:47,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:47,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:48,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:48,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:48,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:48,458 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:48,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:48,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,475 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,479 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:48,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:48,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,536 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:48,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:48,543 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:48,545 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:48,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:48,567 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:48:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790491212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:48,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:48,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996425623] [2021-06-05 04:48:48,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:48,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:48,645 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:48,952 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 04:48:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:48,979 INFO L93 Difference]: Finished difference Result 155 states and 317 transitions. [2021-06-05 04:48:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:48:48,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:48,980 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:48:48,980 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 04:48:48,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 04:48:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-06-05 04:48:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:48:48,981 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:48:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:48,981 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:48:48,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:48:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:48,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:48,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:49,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:49,182 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1788718730, now seen corresponding path program 233 times [2021-06-05 04:48:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642821628] [2021-06-05 04:48:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:49,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642821628] [2021-06-05 04:48:49,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642821628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596363412] [2021-06-05 04:48:49,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:49,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:50,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:50,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:50,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:50,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,049 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:50,054 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,058 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,061 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,069 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:50,076 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:50,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:50,083 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,134 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:50,137 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:50,140 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:50,143 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:50,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:50,164 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:48:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:50,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596363412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:50,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:50,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057380343] [2021-06-05 04:48:50,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:50,237 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:50,634 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 04:48:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:48:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:50,635 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:48:50,635 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:48:50,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:48:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-06-05 04:48:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:48:50,636 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:48:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:50,636 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:48:50,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:48:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:50,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:50,637 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:50,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12265,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:50,837 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1309434054, now seen corresponding path program 234 times [2021-06-05 04:48:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852698516] [2021-06-05 04:48:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:51,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:51,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852698516] [2021-06-05 04:48:51,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852698516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:51,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919308183] [2021-06-05 04:48:51,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:51,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:51,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:52,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:52,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:52,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:52,357 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:52,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:52,369 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,373 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,378 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,382 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:52,387 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:52,392 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:52,397 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:48:52,402 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:52,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:52,407 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,411 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:52,415 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,538 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 04:48:52,538 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 04:48:52,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:52,543 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:52,546 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:52,550 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:52,553 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:52,557 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:52,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:52,607 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:48:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919308183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:52,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:52,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:48:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97827074] [2021-06-05 04:48:52,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:52,771 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:53,301 INFO L93 Difference]: Finished difference Result 157 states and 323 transitions. [2021-06-05 04:48:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:53,301 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:48:53,301 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:48:53,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:48:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-06-05 04:48:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 04:48:53,303 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 04:48:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:53,303 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 04:48:53,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 04:48:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:53,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:53,303 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:53,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12364,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:53,504 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:53,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:53,504 INFO L82 PathProgramCache]: Analyzing trace with hash 506910300, now seen corresponding path program 235 times [2021-06-05 04:48:53,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:53,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978946395] [2021-06-05 04:48:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:53,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978946395] [2021-06-05 04:48:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978946395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555289000] [2021-06-05 04:48:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:54,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:54,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:54,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:54,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:54,492 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:54,496 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,499 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:54,507 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:54,510 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:54,513 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,569 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:54,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:54,572 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:54,575 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:54,578 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:54,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:54,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:54,599 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:48:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:54,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555289000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:54,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:54,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:54,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946759867] [2021-06-05 04:48:54,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:54,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:54,670 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:54,973 INFO L93 Difference]: Finished difference Result 158 states and 323 transitions. [2021-06-05 04:48:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:48:54,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:54,974 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:48:54,974 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:48:54,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:48:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-06-05 04:48:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:48:54,975 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:48:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:54,975 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:48:54,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:48:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:54,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:54,975 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:55,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12509,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:55,176 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1466012768, now seen corresponding path program 236 times [2021-06-05 04:48:55,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:55,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628912621] [2021-06-05 04:48:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:55,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:55,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628912621] [2021-06-05 04:48:55,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628912621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:55,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344418770] [2021-06-05 04:48:55,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:55,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:56,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:56,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:56,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:56,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:56,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:56,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:56,106 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,113 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,120 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:56,125 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:56,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,178 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:48:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:56,181 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:56,184 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:56,187 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:56,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:56,208 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:48:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:56,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344418770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:56,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:56,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:56,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522846642] [2021-06-05 04:48:56,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:56,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:56,285 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:56,656 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 04:48:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:56,657 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:48:56,657 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:48:56,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:48:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 04:48:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:48:56,658 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:48:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:56,659 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:48:56,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:48:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:56,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:56,659 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:56,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12717,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:56,859 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1945297444, now seen corresponding path program 237 times [2021-06-05 04:48:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:56,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431092554] [2021-06-05 04:48:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:57,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431092554] [2021-06-05 04:48:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431092554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647299933] [2021-06-05 04:48:57,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:57,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:57,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:57,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:48:57,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:48:57,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:48:57,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:57,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,984 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,988 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:57,993 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:57,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:57,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:57,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:58,003 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:58,007 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:58,027 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:58,034 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:48:58,039 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:58,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:48:58,043 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,167 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 04:48:58,167 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 04:48:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:58,171 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:58,175 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:58,179 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:58,182 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:58,186 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:58,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:58,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:58,237 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:48:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:58,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647299933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:58,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:58,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:48:58,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624926189] [2021-06-05 04:48:58,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:58,397 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:58,773 INFO L93 Difference]: Finished difference Result 178 states and 356 transitions. [2021-06-05 04:48:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:58,773 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:48:58,773 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:48:58,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:48:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-06-05 04:48:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 04:48:58,775 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 04:48:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:58,775 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 04:48:58,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 04:48:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:58,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:58,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:58,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12877,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:58,976 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash -878267446, now seen corresponding path program 238 times [2021-06-05 04:48:58,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:58,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441853594] [2021-06-05 04:48:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:59,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441853594] [2021-06-05 04:48:59,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441853594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555044190] [2021-06-05 04:48:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:59,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:59,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:59,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:59,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:59,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:59,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:59,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:59,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:48:59,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:48:59,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:59,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:59,421 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:48:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:59,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555044190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:59,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:59,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:48:59,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326773194] [2021-06-05 04:48:59,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:59,491 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:59,755 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 04:48:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:48:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:59,756 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:48:59,756 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:48:59,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:48:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 04:48:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:48:59,757 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:48:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:59,757 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:48:59,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:48:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:48:59,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:59,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:59,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13166,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:59,958 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1357552122, now seen corresponding path program 239 times [2021-06-05 04:48:59,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:59,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304798887] [2021-06-05 04:48:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:00,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304798887] [2021-06-05 04:49:00,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304798887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373303494] [2021-06-05 04:49:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:00,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:49:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:00,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:00,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:00,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:00,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,515 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 04:49:00,516 INFO L628 ElimStorePlain]: treesize reduction 30, result has 84.8 percent of original size [2021-06-05 04:49:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,519 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:00,522 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:00,526 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:00,532 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:00,535 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:00,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:49:00,594 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 04:49:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373303494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:00,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:00,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559955671] [2021-06-05 04:49:00,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:00,758 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:01,079 INFO L93 Difference]: Finished difference Result 178 states and 356 transitions. [2021-06-05 04:49:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:01,080 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:49:01,080 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:49:01,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:49:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-06-05 04:49:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:49:01,081 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:49:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:01,081 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:49:01,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:49:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:01,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:01,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:01,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13184 [2021-06-05 04:49:01,282 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1892781924, now seen corresponding path program 240 times [2021-06-05 04:49:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:01,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621780323] [2021-06-05 04:49:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:01,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:01,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621780323] [2021-06-05 04:49:01,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621780323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:01,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429242850] [2021-06-05 04:49:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:01,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:01,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:01,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:01,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:01,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:01,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:01,709 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,713 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,843 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 04:49:01,843 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.4 percent of original size [2021-06-05 04:49:01,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:01,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,855 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:01,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:01,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:01,866 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:01,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:49:01,922 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 3 variables, input treesize:272, output treesize:125 [2021-06-05 04:49:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:02,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429242850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:02,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:02,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:02,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376870067] [2021-06-05 04:49:02,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:02,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:02,089 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:02,653 INFO L93 Difference]: Finished difference Result 210 states and 417 transitions. [2021-06-05 04:49:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:02,654 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:49:02,654 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:49:02,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:49:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2021-06-05 04:49:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1374045801526718) internal successors, (280), 131 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 280 transitions. [2021-06-05 04:49:02,655 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 280 transitions. Word has length 18 [2021-06-05 04:49:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:02,655 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 280 transitions. [2021-06-05 04:49:02,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 280 transitions. [2021-06-05 04:49:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:02,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:02,656 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:02,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13212 [2021-06-05 04:49:02,856 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1605518330, now seen corresponding path program 241 times [2021-06-05 04:49:02,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:02,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394708268] [2021-06-05 04:49:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:03,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:03,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394708268] [2021-06-05 04:49:03,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394708268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:03,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070079229] [2021-06-05 04:49:03,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:03,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:03,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:49:03,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:03,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,820 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:03,826 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,830 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:03,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,838 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:03,842 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:03,845 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:03,849 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,900 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:49:03,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:03,903 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:03,906 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:03,909 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:03,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:03,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:03,931 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:49:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:04,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070079229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:04,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:04,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:04,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579245341] [2021-06-05 04:49:04,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:04,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:04,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:04,005 INFO L87 Difference]: Start difference. First operand 132 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,302 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:49:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:04,399 INFO L93 Difference]: Finished difference Result 162 states and 336 transitions. [2021-06-05 04:49:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:49:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:04,399 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:49:04,399 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:49:04,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 590.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:49:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 04:49:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 04:49:04,401 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 04:49:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:04,401 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 04:49:04,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 04:49:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:04,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:04,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:04,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13236 [2021-06-05 04:49:04,602 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 716525898, now seen corresponding path program 242 times [2021-06-05 04:49:04,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:04,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760031859] [2021-06-05 04:49:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:04,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:04,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760031859] [2021-06-05 04:49:04,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760031859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:04,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690279891] [2021-06-05 04:49:04,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:04,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:04,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:05,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:49:05,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:05,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:05,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:05,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:05,604 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,608 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,612 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,615 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,619 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:05,624 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:05,627 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:05,630 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,682 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:49:05,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:05,685 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:05,689 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:05,692 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:05,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:05,713 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:49:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690279891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:05,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:05,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530615] [2021-06-05 04:49:05,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:05,789 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:06,145 INFO L93 Difference]: Finished difference Result 159 states and 330 transitions. [2021-06-05 04:49:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:06,145 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:49:06,145 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:49:06,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:49:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 04:49:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:49:06,147 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:49:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:49:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:49:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:06,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:06,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:06,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13455 [2021-06-05 04:49:06,348 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 237241222, now seen corresponding path program 243 times [2021-06-05 04:49:06,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:06,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808641388] [2021-06-05 04:49:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:06,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:06,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808641388] [2021-06-05 04:49:06,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808641388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:06,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154724111] [2021-06-05 04:49:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:06,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:06,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:07,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:49:07,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:49:07,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:07,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:07,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,326 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,331 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:07,336 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:07,341 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:07,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,355 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:07,360 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,364 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:07,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:07,369 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,373 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,497 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 04:49:07,497 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 04:49:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:07,502 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:07,506 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:07,509 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:07,513 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:07,516 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:07,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:07,568 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:49:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:07,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154724111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:07,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:07,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614452568] [2021-06-05 04:49:07,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:07,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:07,730 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:08,095 INFO L93 Difference]: Finished difference Result 153 states and 315 transitions. [2021-06-05 04:49:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:49:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:08,095 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:49:08,095 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:49:08,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:49:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-06-05 04:49:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 04:49:08,097 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 04:49:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:08,097 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 04:49:08,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 04:49:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:08,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:08,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:08,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13654 [2021-06-05 04:49:08,298 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1304271220, now seen corresponding path program 244 times [2021-06-05 04:49:08,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:08,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106760900] [2021-06-05 04:49:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:08,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106760900] [2021-06-05 04:49:08,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106760900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052298288] [2021-06-05 04:49:08,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:08,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:08,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:08,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:08,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:08,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:08,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:08,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:08,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:08,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:08,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:08,781 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:49:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:08,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052298288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:08,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:08,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757310250] [2021-06-05 04:49:08,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:08,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:08,852 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:09,037 INFO L93 Difference]: Finished difference Result 151 states and 310 transitions. [2021-06-05 04:49:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:09,038 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:49:09,038 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:49:09,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:49:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-06-05 04:49:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:49:09,039 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:49:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:09,039 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:49:09,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:49:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:09,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:09,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13869 [2021-06-05 04:49:09,241 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 824986544, now seen corresponding path program 245 times [2021-06-05 04:49:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705488880] [2021-06-05 04:49:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:09,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705488880] [2021-06-05 04:49:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705488880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542745608] [2021-06-05 04:49:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:09,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:49:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:09,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:09,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:09,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:09,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:09,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:09,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:09,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:09,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:09,743 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:09,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:09,749 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:09,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:09,756 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:09,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:09,802 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:49:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542745608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:09,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:09,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37960444] [2021-06-05 04:49:09,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:09,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:09,960 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:10,196 INFO L93 Difference]: Finished difference Result 152 states and 313 transitions. [2021-06-05 04:49:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:49:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:10,196 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:49:10,196 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:49:10,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:49:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-06-05 04:49:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 04:49:10,198 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 04:49:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:10,198 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 04:49:10,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 04:49:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:10,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:10,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:10,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13888,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:10,399 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 289756742, now seen corresponding path program 246 times [2021-06-05 04:49:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:10,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153737792] [2021-06-05 04:49:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:10,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:10,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153737792] [2021-06-05 04:49:10,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153737792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:10,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705970429] [2021-06-05 04:49:10,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:10,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:10,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:10,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:10,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:10,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:10,862 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:10,868 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:10,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:10,907 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:49:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:11,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705970429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:11,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:11,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:11,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876323425] [2021-06-05 04:49:11,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:11,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:11,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:11,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:11,039 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:11,503 INFO L93 Difference]: Finished difference Result 190 states and 385 transitions. [2021-06-05 04:49:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:49:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:11,504 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:49:11,504 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:49:11,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:49:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-06-05 04:49:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 04:49:11,506 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 04:49:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 04:49:11,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 04:49:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:11,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:11,507 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:11,729 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1950460278, now seen corresponding path program 247 times [2021-06-05 04:49:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123193518] [2021-06-05 04:49:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:11,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123193518] [2021-06-05 04:49:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123193518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978477955] [2021-06-05 04:49:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:12,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:12,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:12,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:12,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:12,154 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:12,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:12,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:12,177 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:49:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:12,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978477955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:12,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:12,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:12,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602476952] [2021-06-05 04:49:12,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:12,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:12,250 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:12,554 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 04:49:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:12,554 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:49:12,554 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:49:12,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:49:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 04:49:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:49:12,556 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:49:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:12,556 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:49:12,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:49:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:12,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:12,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:12,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13948,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:12,757 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1865222342, now seen corresponding path program 248 times [2021-06-05 04:49:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103876177] [2021-06-05 04:49:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:12,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103876177] [2021-06-05 04:49:12,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103876177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409031031] [2021-06-05 04:49:12,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:12,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:12,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:13,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:13,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:13,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:13,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:13,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:13,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:13,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:13,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:13,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:13,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:13,274 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:13,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:13,321 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:49:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:13,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409031031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:13,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:13,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:13,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128120961] [2021-06-05 04:49:13,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:13,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:13,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:13,484 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:14,017 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-06-05 04:49:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:49:14,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:14,017 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:49:14,017 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:49:14,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:49:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:49:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 135. [2021-06-05 04:49:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:49:14,019 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:49:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:14,019 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:49:14,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:49:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:14,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:14,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:14,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13972 [2021-06-05 04:49:14,220 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1329992540, now seen corresponding path program 249 times [2021-06-05 04:49:14,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:14,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791071147] [2021-06-05 04:49:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:14,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:14,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791071147] [2021-06-05 04:49:14,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791071147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:14,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417492643] [2021-06-05 04:49:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:14,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:49:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:14,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:14,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:14,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:14,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:14,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:14,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:14,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:14,712 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:14,715 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:14,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:14,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:14,756 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:49:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:14,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417492643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:14,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:14,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:14,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807605221] [2021-06-05 04:49:14,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:14,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:14,893 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:15,579 INFO L93 Difference]: Finished difference Result 213 states and 423 transitions. [2021-06-05 04:49:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:15,580 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:49:15,580 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:49:15,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:49:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:49:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2021-06-05 04:49:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1481481481481484) internal successors, (290), 135 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 290 transitions. [2021-06-05 04:49:15,582 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 290 transitions. Word has length 18 [2021-06-05 04:49:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:15,582 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 290 transitions. [2021-06-05 04:49:15,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 290 transitions. [2021-06-05 04:49:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:15,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:15,582 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:15,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14003,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:15,789 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1361939493, now seen corresponding path program 250 times [2021-06-05 04:49:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:15,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452984696] [2021-06-05 04:49:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:15,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:15,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452984696] [2021-06-05 04:49:15,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452984696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:15,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656690106] [2021-06-05 04:49:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:15,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:15,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:49:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:16,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656690106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:16,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:16,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:49:16,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200107617] [2021-06-05 04:49:16,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:49:16,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:16,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:49:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:49:16,113 INFO L87 Difference]: Start difference. First operand 136 states and 290 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:16,219 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-06-05 04:49:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:49:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:16,220 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:49:16,220 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:49:16,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:49:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 134. [2021-06-05 04:49:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 04:49:16,222 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 04:49:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:16,223 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 04:49:16,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 04:49:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:16,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:16,223 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:16,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14030,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:16,440 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1917737862, now seen corresponding path program 251 times [2021-06-05 04:49:16,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:16,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494781223] [2021-06-05 04:49:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:16,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494781223] [2021-06-05 04:49:16,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494781223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491179995] [2021-06-05 04:49:16,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:16,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:16,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:17,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:17,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:17,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:17,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:17,679 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,684 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:17,688 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:17,692 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:17,697 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:17,701 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,806 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:49:17,806 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:49:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:17,810 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:17,814 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:17,818 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:17,821 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:17,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:17,867 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:49:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491179995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:18,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089215974] [2021-06-05 04:49:18,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:18,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:18,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:18,034 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:18,962 INFO L93 Difference]: Finished difference Result 240 states and 472 transitions. [2021-06-05 04:49:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:49:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:18,963 INFO L225 Difference]: With dead ends: 240 [2021-06-05 04:49:18,963 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:49:18,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1143.6ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:49:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:49:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2021-06-05 04:49:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 04:49:18,964 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 04:49:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:18,964 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 04:49:18,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 04:49:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:18,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:18,965 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:19,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14069,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:19,165 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1628670876, now seen corresponding path program 252 times [2021-06-05 04:49:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:19,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517238276] [2021-06-05 04:49:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:19,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517238276] [2021-06-05 04:49:19,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517238276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296579097] [2021-06-05 04:49:19,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:19,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:20,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:20,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:20,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:20,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:20,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:20,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:20,119 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:20,124 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,185 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:49:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:20,189 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:20,192 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:20,194 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:20,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:20,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:20,216 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:49:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:20,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296579097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:20,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:20,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:20,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208143734] [2021-06-05 04:49:20,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:20,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:20,290 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:20,599 INFO L93 Difference]: Finished difference Result 159 states and 325 transitions. [2021-06-05 04:49:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:49:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:20,599 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:49:20,599 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:49:20,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:49:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-06-05 04:49:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 04:49:20,601 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 04:49:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:20,601 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 04:49:20,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 04:49:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:20,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:20,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:20,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14204 [2021-06-05 04:49:20,802 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash -344252192, now seen corresponding path program 253 times [2021-06-05 04:49:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:20,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205132781] [2021-06-05 04:49:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:20,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:20,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205132781] [2021-06-05 04:49:20,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205132781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:20,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90709293] [2021-06-05 04:49:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:21,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:21,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:21,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:21,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:21,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:21,749 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:21,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,760 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,811 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:49:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:21,815 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:21,818 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:21,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:21,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:21,843 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:49:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90709293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:21,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:21,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675928266] [2021-06-05 04:49:21,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:21,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:21,919 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:22,255 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:49:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:22,278 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 04:49:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:22,278 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:49:22,278 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:49:22,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:49:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-06-05 04:49:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 04:49:22,280 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 04:49:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:22,280 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 04:49:22,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 04:49:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:22,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:22,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14290,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:22,493 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -823536868, now seen corresponding path program 254 times [2021-06-05 04:49:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:22,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933530946] [2021-06-05 04:49:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:22,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933530946] [2021-06-05 04:49:22,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933530946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188019464] [2021-06-05 04:49:22,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:22,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:23,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:23,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:23,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:23,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,621 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:23,626 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,631 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:23,636 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:23,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:23,650 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,654 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:23,658 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:23,663 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,760 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:49:23,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:23,764 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:23,767 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:23,771 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:23,774 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:23,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:23,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:23,813 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:49:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188019464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:23,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:23,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:23,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375816529] [2021-06-05 04:49:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:23,943 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:24,336 INFO L93 Difference]: Finished difference Result 155 states and 319 transitions. [2021-06-05 04:49:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:49:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:24,336 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:49:24,336 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:49:24,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:49:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-06-05 04:49:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:49:24,341 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:49:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:24,341 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:49:24,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:49:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:24,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:24,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:24,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14393,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:24,557 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash 243493130, now seen corresponding path program 255 times [2021-06-05 04:49:24,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:24,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941505145] [2021-06-05 04:49:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:24,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:24,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941505145] [2021-06-05 04:49:24,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941505145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:24,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256845826] [2021-06-05 04:49:24,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:24,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:24,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:24,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:24,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:25,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:25,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:25,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:25,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:25,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:25,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:25,045 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:25,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:25,065 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:49:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:25,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256845826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:25,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:25,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480275805] [2021-06-05 04:49:25,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:25,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:25,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:25,137 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:25,338 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 04:49:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:25,339 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:49:25,339 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:49:25,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:49:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-06-05 04:49:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 04:49:25,340 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 04:49:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:25,340 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 04:49:25,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 04:49:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:25,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:25,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:25,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14498,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:25,541 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -235791546, now seen corresponding path program 256 times [2021-06-05 04:49:25,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:25,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547882501] [2021-06-05 04:49:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:25,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:25,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547882501] [2021-06-05 04:49:25,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547882501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:25,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339750710] [2021-06-05 04:49:25,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:25,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:25,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:25,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:25,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:25,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:25,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:25,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:25,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:26,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:26,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:26,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:26,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:26,040 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:26,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:26,079 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:49:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:26,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339750710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:26,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:26,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238030873] [2021-06-05 04:49:26,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:26,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:26,206 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:26,517 INFO L93 Difference]: Finished difference Result 180 states and 360 transitions. [2021-06-05 04:49:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:26,518 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:49:26,518 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:49:26,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:49:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2021-06-05 04:49:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 04:49:26,520 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 04:49:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:26,520 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 04:49:26,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 04:49:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:26,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:26,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:26,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14523 [2021-06-05 04:49:26,744 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -771021348, now seen corresponding path program 257 times [2021-06-05 04:49:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013427898] [2021-06-05 04:49:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013427898] [2021-06-05 04:49:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013427898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963637189] [2021-06-05 04:49:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:27,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:49:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:27,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:27,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:27,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:27,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:27,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:27,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:27,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:27,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:27,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:27,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:27,402 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:49:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:27,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963637189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:27,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:27,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558661823] [2021-06-05 04:49:27,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:27,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:27,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:27,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:27,532 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:27,805 INFO L93 Difference]: Finished difference Result 158 states and 326 transitions. [2021-06-05 04:49:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:27,805 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:49:27,806 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:49:27,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:49:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 04:49:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 04:49:27,807 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 04:49:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:27,807 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 04:49:27,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 04:49:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:27,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:27,807 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:28,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14545 [2021-06-05 04:49:28,008 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1283728928, now seen corresponding path program 258 times [2021-06-05 04:49:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:28,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424879597] [2021-06-05 04:49:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:28,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:28,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424879597] [2021-06-05 04:49:28,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424879597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:28,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142442370] [2021-06-05 04:49:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:28,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:28,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:28,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:28,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:28,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:28,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:28,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:28,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:28,546 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:49:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:28,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142442370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:28,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:28,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:28,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780016504] [2021-06-05 04:49:28,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:28,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:28,619 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:28,880 INFO L93 Difference]: Finished difference Result 162 states and 336 transitions. [2021-06-05 04:49:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:28,881 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:49:28,881 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:49:28,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:49:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2021-06-05 04:49:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 04:49:28,882 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 04:49:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:28,882 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 04:49:28,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 04:49:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:28,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:28,882 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:29,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14575,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:29,083 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 804444252, now seen corresponding path program 259 times [2021-06-05 04:49:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:29,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53652050] [2021-06-05 04:49:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:29,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53652050] [2021-06-05 04:49:29,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53652050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935854347] [2021-06-05 04:49:29,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:29,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:29,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:29,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:29,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:29,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:29,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:29,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:29,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:29,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:29,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:29,609 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:49:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:29,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935854347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:29,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:29,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:29,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214715724] [2021-06-05 04:49:29,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:29,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:29,736 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:30,068 INFO L93 Difference]: Finished difference Result 180 states and 360 transitions. [2021-06-05 04:49:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:30,069 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:49:30,069 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:49:30,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:49:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2021-06-05 04:49:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 04:49:30,070 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 04:49:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:30,070 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 04:49:30,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 04:49:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:30,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:30,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:30,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14602,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:30,271 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 269214450, now seen corresponding path program 260 times [2021-06-05 04:49:30,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:30,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544313603] [2021-06-05 04:49:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:30,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:30,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544313603] [2021-06-05 04:49:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544313603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:30,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344799849] [2021-06-05 04:49:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:30,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:30,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:30,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:30,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:30,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:30,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:30,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:30,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,818 INFO L628 ElimStorePlain]: treesize reduction 56, result has 67.6 percent of original size [2021-06-05 04:49:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:30,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:30,824 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,827 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:30,831 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:30,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:30,870 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:234, output treesize:79 [2021-06-05 04:49:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:30,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344799849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:30,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:30,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:30,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335398097] [2021-06-05 04:49:30,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:30,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:30,997 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:31,591 INFO L93 Difference]: Finished difference Result 212 states and 421 transitions. [2021-06-05 04:49:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:31,592 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:49:31,592 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:49:31,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:49:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2021-06-05 04:49:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:49:31,593 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:49:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:31,593 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:49:31,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:49:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:31,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:31,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:31,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14628 [2021-06-05 04:49:31,794 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash 856959772, now seen corresponding path program 261 times [2021-06-05 04:49:31,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:31,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556594915] [2021-06-05 04:49:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:31,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:31,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556594915] [2021-06-05 04:49:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556594915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:31,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180342202] [2021-06-05 04:49:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:32,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:32,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:32,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:32,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:32,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:32,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:32,953 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:32,958 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:32,964 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,968 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,972 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,976 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:32,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:32,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:32,985 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,088 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:49:33,088 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:49:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:33,092 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:33,096 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:33,100 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:33,103 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:33,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:33,154 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:49:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:33,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180342202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:33,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:33,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922755312] [2021-06-05 04:49:33,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:33,319 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:34,263 INFO L93 Difference]: Finished difference Result 242 states and 476 transitions. [2021-06-05 04:49:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:49:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:34,264 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:49:34,264 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:49:34,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:49:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:49:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 136. [2021-06-05 04:49:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 04:49:34,266 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 04:49:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:34,266 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 04:49:34,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 04:49:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:34,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:34,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:34,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14653 [2021-06-05 04:49:34,481 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -828699702, now seen corresponding path program 262 times [2021-06-05 04:49:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523678422] [2021-06-05 04:49:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:34,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:34,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523678422] [2021-06-05 04:49:34,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523678422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:34,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709196253] [2021-06-05 04:49:34,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:34,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:34,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:34,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:34,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:34,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:34,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:34,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:34,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:34,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:34,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:34,945 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:49:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:35,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709196253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:35,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:35,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719273606] [2021-06-05 04:49:35,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:35,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:35,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:35,018 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:35,224 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2021-06-05 04:49:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:35,224 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:49:35,224 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:49:35,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:49:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-06-05 04:49:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.129496402877698) internal successors, (296), 139 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 296 transitions. [2021-06-05 04:49:35,226 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 296 transitions. Word has length 18 [2021-06-05 04:49:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:35,226 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 296 transitions. [2021-06-05 04:49:35,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 296 transitions. [2021-06-05 04:49:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:35,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:35,226 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:35,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14753 [2021-06-05 04:49:35,427 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1307984378, now seen corresponding path program 263 times [2021-06-05 04:49:35,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:35,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53846862] [2021-06-05 04:49:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53846862] [2021-06-05 04:49:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53846862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282044243] [2021-06-05 04:49:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:35,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:49:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:35,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:35,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:35,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:35,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:35,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:35,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:35,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:35,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,008 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 04:49:36,009 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-06-05 04:49:36,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:36,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:36,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:36,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:36,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:36,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:36,029 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:36,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:49:36,088 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 04:49:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282044243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:36,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:36,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338898123] [2021-06-05 04:49:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:36,265 INFO L87 Difference]: Start difference. First operand 140 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:36,597 INFO L93 Difference]: Finished difference Result 182 states and 364 transitions. [2021-06-05 04:49:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:36,598 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:49:36,598 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 04:49:36,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 04:49:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2021-06-05 04:49:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2021-06-05 04:49:36,600 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 18 [2021-06-05 04:49:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:36,600 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2021-06-05 04:49:36,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2021-06-05 04:49:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:36,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:36,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14779 [2021-06-05 04:49:36,800 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1843214180, now seen corresponding path program 264 times [2021-06-05 04:49:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603529438] [2021-06-05 04:49:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:36,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603529438] [2021-06-05 04:49:36,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603529438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622343619] [2021-06-05 04:49:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:37,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:37,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:37,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:37,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:37,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:37,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:37,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:37,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:37,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:37,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:37,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:37,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:37,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:37,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:37,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:37,363 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:49:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:37,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622343619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:37,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:37,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:37,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878314496] [2021-06-05 04:49:37,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:37,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:37,525 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:37,783 INFO L93 Difference]: Finished difference Result 160 states and 330 transitions. [2021-06-05 04:49:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:37,784 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:49:37,784 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:49:37,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:49:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2021-06-05 04:49:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 04:49:37,785 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 04:49:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:37,785 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 04:49:37,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 04:49:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:37,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:37,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:37,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14808,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:37,986 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1255468858, now seen corresponding path program 265 times [2021-06-05 04:49:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:37,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935134573] [2021-06-05 04:49:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:38,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935134573] [2021-06-05 04:49:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935134573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086513253] [2021-06-05 04:49:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:38,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:38,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:38,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:38,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:38,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,948 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:38,953 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:38,957 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:38,962 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,966 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:38,970 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:39,078 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:49:39,078 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:49:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:39,091 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:39,096 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:39,102 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:39,107 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:39,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:39,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:39,165 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:49:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:39,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086513253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:39,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:39,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66439436] [2021-06-05 04:49:39,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:39,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:39,333 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:40,258 INFO L93 Difference]: Finished difference Result 244 states and 480 transitions. [2021-06-05 04:49:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:49:40,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:40,259 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:49:40,259 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:49:40,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1111.1ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:49:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:49:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 137. [2021-06-05 04:49:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 04:49:40,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 04:49:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:40,260 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 04:49:40,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 04:49:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:40,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:40,261 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:40,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14841 [2021-06-05 04:49:40,461 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:40,461 INFO L82 PathProgramCache]: Analyzing trace with hash -215233060, now seen corresponding path program 266 times [2021-06-05 04:49:40,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:40,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287282497] [2021-06-05 04:49:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:40,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:40,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287282497] [2021-06-05 04:49:40,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287282497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:40,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781701311] [2021-06-05 04:49:40,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:40,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:40,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:41,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:41,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:41,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:41,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:41,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:41,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:41,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,734 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:41,739 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,748 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,752 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:41,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,866 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:49:41,866 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:49:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:41,870 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:41,874 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:41,877 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:41,881 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:41,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:41,926 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:49:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:42,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781701311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:42,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:42,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:49:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507045928] [2021-06-05 04:49:42,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:49:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:49:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:42,098 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:42,225 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-05 04:49:42,748 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 04:49:43,091 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 04:49:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:43,433 INFO L93 Difference]: Finished difference Result 273 states and 533 transitions. [2021-06-05 04:49:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:49:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:43,434 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:49:43,434 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:49:43,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:49:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:49:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 142. [2021-06-05 04:49:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1631205673758864) internal successors, (305), 141 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 305 transitions. [2021-06-05 04:49:43,435 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 305 transitions. Word has length 18 [2021-06-05 04:49:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:43,435 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 305 transitions. [2021-06-05 04:49:43,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 305 transitions. [2021-06-05 04:49:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:43,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:43,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:43,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14977,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:43,636 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1459425270, now seen corresponding path program 267 times [2021-06-05 04:49:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911958355] [2021-06-05 04:49:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911958355] [2021-06-05 04:49:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911958355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071620706] [2021-06-05 04:49:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:43,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:49:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:49:44,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:44,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:44,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:44,612 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:44,616 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:44,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,630 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:44,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,637 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,689 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 04:49:44,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:44,692 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:44,695 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:44,698 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:44,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:44,720 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:606, output treesize:52 [2021-06-05 04:49:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071620706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:44,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:44,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:44,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405089982] [2021-06-05 04:49:44,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:44,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:44,792 INFO L87 Difference]: Start difference. First operand 142 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:45,123 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 04:49:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:45,151 INFO L93 Difference]: Finished difference Result 165 states and 341 transitions. [2021-06-05 04:49:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:49:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:45,151 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:49:45,152 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:49:45,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:49:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-06-05 04:49:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 142 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 307 transitions. [2021-06-05 04:49:45,153 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 307 transitions. Word has length 18 [2021-06-05 04:49:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:45,153 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 307 transitions. [2021-06-05 04:49:45,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 307 transitions. [2021-06-05 04:49:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:45,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:45,153 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:45,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15145,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:45,354 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash 862618958, now seen corresponding path program 268 times [2021-06-05 04:49:45,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:45,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488339141] [2021-06-05 04:49:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:45,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488339141] [2021-06-05 04:49:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488339141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795905314] [2021-06-05 04:49:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:45,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:46,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:46,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:46,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:46,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,312 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:46,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:46,324 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:46,329 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:46,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,393 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:49:46,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:46,397 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:46,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:46,403 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:46,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:46,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:46,424 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:49:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:46,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795905314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:46,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:46,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:46,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721275473] [2021-06-05 04:49:46,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:46,497 INFO L87 Difference]: Start difference. First operand 143 states and 307 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:46,897 INFO L93 Difference]: Finished difference Result 163 states and 338 transitions. [2021-06-05 04:49:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:46,898 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:49:46,898 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:49:46,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:49:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-06-05 04:49:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.160839160839161) internal successors, (309), 143 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 309 transitions. [2021-06-05 04:49:46,899 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 309 transitions. Word has length 18 [2021-06-05 04:49:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:46,899 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 309 transitions. [2021-06-05 04:49:46,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 309 transitions. [2021-06-05 04:49:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:46,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:46,900 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:47,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15372 [2021-06-05 04:49:47,100 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 383334282, now seen corresponding path program 269 times [2021-06-05 04:49:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:47,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188305952] [2021-06-05 04:49:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:47,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188305952] [2021-06-05 04:49:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188305952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119464061] [2021-06-05 04:49:47,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:47,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:49:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:48,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:48,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:48,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:48,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:48,064 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:48,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:48,073 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:48,078 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,081 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,175 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:49:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:48,179 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:48,182 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:48,186 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:48,189 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:48,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:48,228 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:49:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119464061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:48,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:48,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987570729] [2021-06-05 04:49:48,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:48,356 INFO L87 Difference]: Start difference. First operand 144 states and 309 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:48,770 INFO L93 Difference]: Finished difference Result 168 states and 348 transitions. [2021-06-05 04:49:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:48,771 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:49:48,771 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:49:48,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 628.2ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:49:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-06-05 04:49:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1597222222222223) internal successors, (311), 144 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 311 transitions. [2021-06-05 04:49:48,772 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 311 transitions. Word has length 18 [2021-06-05 04:49:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:48,772 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 311 transitions. [2021-06-05 04:49:48,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 311 transitions. [2021-06-05 04:49:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:48,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:48,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:48,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15520,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:48,973 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1450364280, now seen corresponding path program 270 times [2021-06-05 04:49:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751858544] [2021-06-05 04:49:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:49,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751858544] [2021-06-05 04:49:49,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751858544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638236273] [2021-06-05 04:49:49,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:49,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:49,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:49,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:49,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:49,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:49,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:49,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:49,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:49,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:49,453 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:49:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638236273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:49,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:49,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:49,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238076902] [2021-06-05 04:49:49,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:49,523 INFO L87 Difference]: Start difference. First operand 145 states and 311 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:49,776 INFO L93 Difference]: Finished difference Result 174 states and 364 transitions. [2021-06-05 04:49:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:49,777 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:49:49,777 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:49:49,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:49:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2021-06-05 04:49:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 04:49:49,778 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 04:49:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:49,778 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 04:49:49,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 04:49:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:49,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:49,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:49,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15653,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:49,979 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash 971079604, now seen corresponding path program 271 times [2021-06-05 04:49:49,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:49,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690803638] [2021-06-05 04:49:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:50,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690803638] [2021-06-05 04:49:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690803638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093245011] [2021-06-05 04:49:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:50,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:50,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:50,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:50,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:50,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:50,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:50,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:50,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:50,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:50,474 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:50,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:50,519 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:49:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093245011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:50,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:50,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:50,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354405231] [2021-06-05 04:49:50,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:50,674 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:51,051 INFO L93 Difference]: Finished difference Result 166 states and 345 transitions. [2021-06-05 04:49:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:51,051 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:49:51,051 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:49:51,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:49:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 04:49:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 04:49:51,053 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 04:49:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:51,053 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 04:49:51,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 04:49:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:51,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:51,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:51,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15686,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:51,254 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 435849802, now seen corresponding path program 272 times [2021-06-05 04:49:51,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:51,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333381582] [2021-06-05 04:49:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:51,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:51,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333381582] [2021-06-05 04:49:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333381582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:51,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816180514] [2021-06-05 04:49:51,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:51,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:51,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:51,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:51,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:51,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:51,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:51,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:51,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:51,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:51,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:51,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:51,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:51,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:51,773 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:51,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:51,779 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:51,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:51,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:51,825 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:49:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816180514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560110469] [2021-06-05 04:49:51,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:51,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:51,985 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:52,641 INFO L93 Difference]: Finished difference Result 224 states and 449 transitions. [2021-06-05 04:49:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:52,641 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:49:52,642 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:49:52,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 848.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:49:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:49:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2021-06-05 04:49:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1597222222222223) internal successors, (311), 144 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 311 transitions. [2021-06-05 04:49:52,643 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 311 transitions. Word has length 18 [2021-06-05 04:49:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:52,643 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 311 transitions. [2021-06-05 04:49:52,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 311 transitions. [2021-06-05 04:49:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:52,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:52,643 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:52,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15719 [2021-06-05 04:49:52,844 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1804367218, now seen corresponding path program 273 times [2021-06-05 04:49:52,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:52,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39423288] [2021-06-05 04:49:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:52,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39423288] [2021-06-05 04:49:52,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39423288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379771315] [2021-06-05 04:49:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:53,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:53,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:53,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:53,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:53,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:53,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:53,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:53,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:53,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:53,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:53,394 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:49:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:53,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379771315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:53,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:53,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:53,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209383557] [2021-06-05 04:49:53,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:53,473 INFO L87 Difference]: Start difference. First operand 145 states and 311 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:53,759 INFO L93 Difference]: Finished difference Result 175 states and 366 transitions. [2021-06-05 04:49:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:53,760 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:49:53,760 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:49:53,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:49:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2021-06-05 04:49:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1564625850340136) internal successors, (317), 147 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 317 transitions. [2021-06-05 04:49:53,761 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 317 transitions. Word has length 18 [2021-06-05 04:49:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 317 transitions. [2021-06-05 04:49:53,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 317 transitions. [2021-06-05 04:49:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:53,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:53,762 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:53,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-06-05 04:49:53,962 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2011315402, now seen corresponding path program 274 times [2021-06-05 04:49:53,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:53,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049840958] [2021-06-05 04:49:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:54,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049840958] [2021-06-05 04:49:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049840958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332462083] [2021-06-05 04:49:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:54,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:54,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:54,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:54,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:54,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:54,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:54,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:54,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:54,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:54,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:54,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:54,438 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:49:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:54,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332462083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:54,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:54,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023269988] [2021-06-05 04:49:54,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:54,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:54,575 INFO L87 Difference]: Start difference. First operand 148 states and 317 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:54,977 INFO L93 Difference]: Finished difference Result 167 states and 347 transitions. [2021-06-05 04:49:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:54,978 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:49:54,978 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:49:54,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:49:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-06-05 04:49:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 04:49:54,979 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 04:49:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:54,979 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 04:49:54,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 04:49:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:54,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:54,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:55,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:55,203 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1476085600, now seen corresponding path program 275 times [2021-06-05 04:49:55,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:55,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727928170] [2021-06-05 04:49:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:55,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727928170] [2021-06-05 04:49:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727928170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104009444] [2021-06-05 04:49:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:55,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:49:55,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:55,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:55,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:55,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:55,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:55,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:55,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:55,696 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:55,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:55,702 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:55,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:55,739 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:49:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:55,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104009444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:55,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:55,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739380323] [2021-06-05 04:49:55,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:55,865 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:56,425 INFO L93 Difference]: Finished difference Result 225 states and 451 transitions. [2021-06-05 04:49:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:56,426 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:49:56,426 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:49:56,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:49:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:49:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 04:49:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 04:49:56,427 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 04:49:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:56,427 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 04:49:56,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 04:49:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:56,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:56,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:56,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15805 [2021-06-05 04:49:56,628 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2063830922, now seen corresponding path program 276 times [2021-06-05 04:49:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:56,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539778890] [2021-06-05 04:49:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:56,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539778890] [2021-06-05 04:49:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539778890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885100319] [2021-06-05 04:49:56,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:56,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:49:56,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:57,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:49:57,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:49:57,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:57,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:57,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:49:57,837 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,842 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,847 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,852 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:57,857 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:49:57,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:57,873 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:57,880 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:49:57,886 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,890 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:57,894 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,033 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:49:58,033 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:49:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:58,038 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:58,048 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:58,052 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:58,056 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:58,059 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:58,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:58,118 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 04:49:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:58,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885100319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:58,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:58,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:49:58,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481397701] [2021-06-05 04:49:58,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:58,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:58,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:58,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:58,296 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:59,183 INFO L93 Difference]: Finished difference Result 255 states and 506 transitions. [2021-06-05 04:49:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:49:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:49:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:59,183 INFO L225 Difference]: With dead ends: 255 [2021-06-05 04:49:59,184 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 04:49:59,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1126.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 04:49:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 146. [2021-06-05 04:49:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 04:49:59,185 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 04:49:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:59,185 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 04:49:59,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 04:49:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:49:59,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:59,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:59,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15835 [2021-06-05 04:49:59,386 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash 378171448, now seen corresponding path program 277 times [2021-06-05 04:49:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:59,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147939582] [2021-06-05 04:49:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:59,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147939582] [2021-06-05 04:49:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147939582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643995944] [2021-06-05 04:49:59,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:49:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:59,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:59,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:59,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:59,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:59,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:49:59,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:59,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:49:59,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:59,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:59,863 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:49:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:59,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643995944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:59,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:59,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:49:59,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516358457] [2021-06-05 04:49:59,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:59,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:59,935 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:00,199 INFO L93 Difference]: Finished difference Result 169 states and 350 transitions. [2021-06-05 04:50:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:00,200 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:50:00,200 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:50:00,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:50:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-06-05 04:50:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 04:50:00,201 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 04:50:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:00,202 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 04:50:00,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 04:50:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:00,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:00,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:00,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15974 [2021-06-05 04:50:00,402 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -101113228, now seen corresponding path program 278 times [2021-06-05 04:50:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:00,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418460132] [2021-06-05 04:50:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:00,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:00,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418460132] [2021-06-05 04:50:00,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418460132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:00,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11899555] [2021-06-05 04:50:00,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:00,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:00,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:00,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:00,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:00,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:00,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:00,909 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:00,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:00,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:00,919 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:00,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:00,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:50:00,972 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:50:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:01,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11899555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:01,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:01,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:50:01,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466141571] [2021-06-05 04:50:01,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:01,138 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:02,119 INFO L93 Difference]: Finished difference Result 237 states and 465 transitions. [2021-06-05 04:50:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:50:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:02,120 INFO L225 Difference]: With dead ends: 237 [2021-06-05 04:50:02,120 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:50:02,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:50:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:50:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2021-06-05 04:50:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:50:02,121 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 04:50:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:02,121 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:50:02,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:50:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:02,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:02,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:02,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15996,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:02,322 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash -636343030, now seen corresponding path program 279 times [2021-06-05 04:50:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:02,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031166647] [2021-06-05 04:50:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:02,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:02,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031166647] [2021-06-05 04:50:02,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031166647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76440339] [2021-06-05 04:50:02,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:02,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:50:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:02,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:02,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:02,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:02,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:02,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:02,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:02,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:02,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:02,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:02,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:02,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:02,850 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:50:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:02,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76440339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:02,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:50:02,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423302489] [2021-06-05 04:50:02,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:02,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:02,982 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:03,546 INFO L93 Difference]: Finished difference Result 227 states and 457 transitions. [2021-06-05 04:50:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:03,547 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:50:03,547 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:50:03,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:50:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 149. [2021-06-05 04:50:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:50:03,548 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 04:50:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:03,548 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:50:03,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:50:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:03,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:03,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:03,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16026 [2021-06-05 04:50:03,749 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -48597708, now seen corresponding path program 280 times [2021-06-05 04:50:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:03,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611425002] [2021-06-05 04:50:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:03,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:03,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611425002] [2021-06-05 04:50:03,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611425002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:03,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505731566] [2021-06-05 04:50:03,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:04,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:04,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:50:04,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:50:04,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:04,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:04,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:50:04,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:50:04,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:04,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,790 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:04,796 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:50:04,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,807 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,817 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,822 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,826 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,831 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:04,836 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,840 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:04,844 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,987 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 04:50:04,987 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-06-05 04:50:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:04,992 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:04,996 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:05,000 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:05,004 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:05,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:05,007 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:05,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:05,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:50:05,067 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 04:50:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:05,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505731566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:05,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:05,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:50:05,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757635585] [2021-06-05 04:50:05,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:50:05,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:05,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:50:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:50:05,256 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:06,164 INFO L93 Difference]: Finished difference Result 258 states and 514 transitions. [2021-06-05 04:50:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:06,165 INFO L225 Difference]: With dead ends: 258 [2021-06-05 04:50:06,165 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:50:06,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:50:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-06-05 04:50:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:50:06,167 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 04:50:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:06,167 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:50:06,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:50:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:06,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:06,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:06,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16052 [2021-06-05 04:50:06,368 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash 991638090, now seen corresponding path program 281 times [2021-06-05 04:50:06,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:06,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006287050] [2021-06-05 04:50:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:06,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:06,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006287050] [2021-06-05 04:50:06,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006287050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:06,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612566023] [2021-06-05 04:50:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:06,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:07,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:07,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:07,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:07,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:07,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:07,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,537 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-06-05 04:50:07,538 INFO L628 ElimStorePlain]: treesize reduction 375, result has 23.8 percent of original size [2021-06-05 04:50:07,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:07,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:07,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:07,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:07,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:07,714 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:07,760 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:07,798 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:07,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:07,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:07,833 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 04:50:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:07,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612566023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:07,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:07,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:50:07,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491965122] [2021-06-05 04:50:07,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:50:07,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:50:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:07,962 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:08,143 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 04:50:08,696 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-05 04:50:09,067 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 04:50:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:09,435 INFO L93 Difference]: Finished difference Result 286 states and 565 transitions. [2021-06-05 04:50:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:50:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:09,436 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:50:09,436 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:50:09,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1646.2ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:50:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:50:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-06-05 04:50:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:50:09,442 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 04:50:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:09,442 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:50:09,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:50:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:09,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:09,442 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16275 [2021-06-05 04:50:09,643 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1106917878, now seen corresponding path program 282 times [2021-06-05 04:50:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173628717] [2021-06-05 04:50:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:09,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:09,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173628717] [2021-06-05 04:50:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173628717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:09,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706429038] [2021-06-05 04:50:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:09,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:50:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:10,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:10,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:10,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:10,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:10,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:10,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:10,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:10,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:50:10,143 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:50:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:10,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706429038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:10,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:10,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:50:10,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386624967] [2021-06-05 04:50:10,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:10,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:10,214 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:10,503 INFO L93 Difference]: Finished difference Result 180 states and 377 transitions. [2021-06-05 04:50:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:10,503 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:50:10,503 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:50:10,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:50:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 04:50:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1677852348993287) internal successors, (323), 149 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 323 transitions. [2021-06-05 04:50:10,505 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 323 transitions. Word has length 18 [2021-06-05 04:50:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:10,505 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 323 transitions. [2021-06-05 04:50:10,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 323 transitions. [2021-06-05 04:50:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:10,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:10,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:10,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16424,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:10,706 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1586202554, now seen corresponding path program 283 times [2021-06-05 04:50:10,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:10,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041571711] [2021-06-05 04:50:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:10,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:10,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041571711] [2021-06-05 04:50:10,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041571711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:10,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197267123] [2021-06-05 04:50:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:11,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:11,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:11,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:11,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:11,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:11,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:11,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:11,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:11,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:11,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:11,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:11,219 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:11,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:50:11,268 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:50:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:11,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197267123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:11,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:11,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:50:11,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251633212] [2021-06-05 04:50:11,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:11,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:11,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:11,429 INFO L87 Difference]: Start difference. First operand 150 states and 323 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:12,250 INFO L93 Difference]: Finished difference Result 216 states and 438 transitions. [2021-06-05 04:50:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:12,250 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:50:12,251 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:50:12,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:50:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2021-06-05 04:50:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:50:12,253 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 04:50:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:12,253 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:50:12,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:50:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:12,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:12,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:12,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16458,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:12,469 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2121432356, now seen corresponding path program 284 times [2021-06-05 04:50:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:12,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74582943] [2021-06-05 04:50:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:12,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:12,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74582943] [2021-06-05 04:50:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74582943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:12,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069711343] [2021-06-05 04:50:12,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:12,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:12,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:12,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:12,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:12,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:12,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:12,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:12,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:12,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:12,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:12,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:12,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:12,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:12,972 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:13,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:13,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:50:13,019 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:50:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:13,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069711343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:13,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:13,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:50:13,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20017619] [2021-06-05 04:50:13,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:13,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:13,179 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:13,751 INFO L93 Difference]: Finished difference Result 233 states and 468 transitions. [2021-06-05 04:50:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:13,752 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:50:13,752 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:50:13,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:50:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2021-06-05 04:50:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 04:50:13,754 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 04:50:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:13,754 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 04:50:13,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 04:50:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:13,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:13,754 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:13,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16491 [2021-06-05 04:50:13,955 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2089485403, now seen corresponding path program 285 times [2021-06-05 04:50:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:13,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070254008] [2021-06-05 04:50:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:14,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070254008] [2021-06-05 04:50:14,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070254008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413826694] [2021-06-05 04:50:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:14,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:50:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:14,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413826694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:14,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:14,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:50:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145230783] [2021-06-05 04:50:14,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:50:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:50:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:50:14,173 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:14,304 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 04:50:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:50:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:14,305 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:50:14,305 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:50:14,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:50:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2021-06-05 04:50:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1700680272108843) internal successors, (319), 147 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 319 transitions. [2021-06-05 04:50:14,306 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 319 transitions. Word has length 18 [2021-06-05 04:50:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:14,307 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 319 transitions. [2021-06-05 04:50:14,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 319 transitions. [2021-06-05 04:50:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:14,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:14,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16521 [2021-06-05 04:50:14,507 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1533687034, now seen corresponding path program 286 times [2021-06-05 04:50:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278506715] [2021-06-05 04:50:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278506715] [2021-06-05 04:50:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278506715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134924764] [2021-06-05 04:50:14,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:14,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:14,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:15,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:50:15,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:15,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:15,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:15,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:50:15,715 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:50:15,727 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:15,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,738 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,742 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:15,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:15,748 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,752 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:15,761 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,869 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:50:15,869 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:50:15,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:15,873 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:15,877 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:15,882 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:15,886 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:15,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:15,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:15,933 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:50:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134924764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:50:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145653094] [2021-06-05 04:50:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:50:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:50:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:50:16,100 INFO L87 Difference]: Start difference. First operand 148 states and 319 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:16,668 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 04:50:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:17,027 INFO L93 Difference]: Finished difference Result 260 states and 517 transitions. [2021-06-05 04:50:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:17,028 INFO L225 Difference]: With dead ends: 260 [2021-06-05 04:50:17,028 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 04:50:17,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 04:50:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 147. [2021-06-05 04:50:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 04:50:17,030 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 18 [2021-06-05 04:50:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:17,030 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 04:50:17,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 04:50:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:17,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:17,030 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:17,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16529,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:17,230 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash -493451236, now seen corresponding path program 287 times [2021-06-05 04:50:17,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:17,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081391239] [2021-06-05 04:50:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:17,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081391239] [2021-06-05 04:50:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081391239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165482111] [2021-06-05 04:50:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:17,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:18,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:18,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:50:18,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:18,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:18,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,347 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 04:50:18,347 INFO L628 ElimStorePlain]: treesize reduction 373, result has 23.7 percent of original size [2021-06-05 04:50:18,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:18,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:18,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:18,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:18,482 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:18,522 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:18,561 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:18,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:18,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:18,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:18,633 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 04:50:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:18,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165482111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:18,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:18,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:50:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98948146] [2021-06-05 04:50:18,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:50:18,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:50:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:18,765 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:18,941 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 04:50:19,083 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-05 04:50:19,635 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-05 04:50:19,844 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 04:50:19,982 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 04:50:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:20,404 INFO L93 Difference]: Finished difference Result 287 states and 566 transitions. [2021-06-05 04:50:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:50:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:20,405 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:50:20,405 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 04:50:20,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1736.0ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:50:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 04:50:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 147. [2021-06-05 04:50:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 04:50:20,407 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 18 [2021-06-05 04:50:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:20,407 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 04:50:20,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 04:50:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:50:20,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:20,407 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:20,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16679,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:20,608 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash 844115978, now seen corresponding path program 288 times [2021-06-05 04:50:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:20,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610423910] [2021-06-05 04:50:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:20,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610423910] [2021-06-05 04:50:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610423910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808750768] [2021-06-05 04:50:20,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:20,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:50:20,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:50:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:21,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:21,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:21,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:50:21,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:21,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:50:21,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:21,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,894 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 04:50:21,895 INFO L628 ElimStorePlain]: treesize reduction 370, result has 24.0 percent of original size [2021-06-05 04:50:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:21,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:21,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:50:21,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:21,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:21,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:21,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:22,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:22,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:50:22,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:22,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:22,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:22,082 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:22,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:22,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:22,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:22,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:22,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:22,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:22,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:22,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:22,193 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 04:50:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808750768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:22,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:22,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:50:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844545788] [2021-06-05 04:50:22,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:22,320 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:22,810 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 04:50:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:22,978 INFO L93 Difference]: Finished difference Result 209 states and 430 transitions. [2021-06-05 04:50:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:50:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:50:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:22,979 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:50:22,979 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:50:22,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 935.4ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:50:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:50:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2021-06-05 04:50:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1733333333333333) internal successors, (326), 150 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 326 transitions. [2021-06-05 04:50:22,981 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 326 transitions. Word has length 18 [2021-06-05 04:50:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:22,981 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 326 transitions. [2021-06-05 04:50:22,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 326 transitions. [2021-06-05 04:50:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:22,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:22,981 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:23,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16786 [2021-06-05 04:50:23,181 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318047, now seen corresponding path program 289 times [2021-06-05 04:50:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:23,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411904111] [2021-06-05 04:50:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:23,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411904111] [2021-06-05 04:50:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411904111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753601769] [2021-06-05 04:50:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:23,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753601769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:23,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:23,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:23,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817265344] [2021-06-05 04:50:23,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:23,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:23,407 INFO L87 Difference]: Start difference. First operand 151 states and 326 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:23,550 INFO L93 Difference]: Finished difference Result 199 states and 416 transitions. [2021-06-05 04:50:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:23,550 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:50:23,550 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:50:23,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:50:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 155. [2021-06-05 04:50:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 04:50:23,552 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 04:50:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:23,552 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 04:50:23,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 04:50:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:23,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:23,552 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:23,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16916 [2021-06-05 04:50:23,753 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash 112722865, now seen corresponding path program 290 times [2021-06-05 04:50:23,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:23,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455667952] [2021-06-05 04:50:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455667952] [2021-06-05 04:50:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455667952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613571386] [2021-06-05 04:50:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:23,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613571386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:23,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:23,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:23,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137471998] [2021-06-05 04:50:23,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:23,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:23,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:23,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:23,986 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:24,149 INFO L93 Difference]: Finished difference Result 198 states and 418 transitions. [2021-06-05 04:50:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:24,150 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:50:24,150 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:50:24,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:50:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 155. [2021-06-05 04:50:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 04:50:24,151 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 04:50:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 04:50:24,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 04:50:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:24,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:24,152 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:24,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16920,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:24,367 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 121885699, now seen corresponding path program 291 times [2021-06-05 04:50:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:24,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382696174] [2021-06-05 04:50:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:24,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382696174] [2021-06-05 04:50:24,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382696174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221067965] [2021-06-05 04:50:24,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:24,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:24,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221067965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:24,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:24,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:24,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535601515] [2021-06-05 04:50:24,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:24,617 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:24,774 INFO L93 Difference]: Finished difference Result 190 states and 402 transitions. [2021-06-05 04:50:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:24,775 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:50:24,775 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:50:24,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:50:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 155. [2021-06-05 04:50:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 04:50:24,776 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 04:50:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:24,776 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 04:50:24,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 04:50:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:24,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:24,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:24,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16924 [2021-06-05 04:50:24,977 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 758136460, now seen corresponding path program 292 times [2021-06-05 04:50:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:24,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726271939] [2021-06-05 04:50:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:25,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:25,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726271939] [2021-06-05 04:50:25,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726271939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:25,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89254354] [2021-06-05 04:50:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:25,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89254354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:25,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:25,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:25,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315189734] [2021-06-05 04:50:25,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:25,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:25,577 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:25,904 INFO L93 Difference]: Finished difference Result 198 states and 408 transitions. [2021-06-05 04:50:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:25,905 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:50:25,905 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:50:25,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:50:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 155. [2021-06-05 04:50:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 154 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 333 transitions. [2021-06-05 04:50:25,906 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 333 transitions. Word has length 19 [2021-06-05 04:50:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:25,906 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 333 transitions. [2021-06-05 04:50:25,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 333 transitions. [2021-06-05 04:50:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:25,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:25,907 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:26,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16928,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:26,107 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1263292047, now seen corresponding path program 293 times [2021-06-05 04:50:26,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:26,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653850470] [2021-06-05 04:50:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:26,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653850470] [2021-06-05 04:50:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653850470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564514600] [2021-06-05 04:50:26,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:26,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:26,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564514600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:26,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:26,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:26,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262538516] [2021-06-05 04:50:26,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:26,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:26,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:26,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:26,338 INFO L87 Difference]: Start difference. First operand 155 states and 333 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:26,512 INFO L93 Difference]: Finished difference Result 186 states and 393 transitions. [2021-06-05 04:50:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:26,512 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:50:26,512 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:50:26,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:50:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-05 04:50:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 154 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 333 transitions. [2021-06-05 04:50:26,514 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 333 transitions. Word has length 19 [2021-06-05 04:50:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:26,514 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 333 transitions. [2021-06-05 04:50:26,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 333 transitions. [2021-06-05 04:50:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:26,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:26,514 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:26,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16948 [2021-06-05 04:50:26,715 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash -272936504, now seen corresponding path program 294 times [2021-06-05 04:50:26,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:26,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647322526] [2021-06-05 04:50:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647322526] [2021-06-05 04:50:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647322526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055961351] [2021-06-05 04:50:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:26,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:26,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:26,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:26,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055961351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:27,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:27,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114165890] [2021-06-05 04:50:27,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:27,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:27,210 INFO L87 Difference]: Start difference. First operand 155 states and 333 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:27,593 INFO L93 Difference]: Finished difference Result 198 states and 409 transitions. [2021-06-05 04:50:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:27,594 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:50:27,594 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:50:27,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:50:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2021-06-05 04:50:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 04:50:27,596 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 04:50:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:27,596 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 04:50:27,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 04:50:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:27,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:27,596 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:27,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16952,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:27,797 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2017160771, now seen corresponding path program 295 times [2021-06-05 04:50:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919153088] [2021-06-05 04:50:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:27,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919153088] [2021-06-05 04:50:27,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919153088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030076277] [2021-06-05 04:50:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030076277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:28,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:28,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:28,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780364214] [2021-06-05 04:50:28,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:28,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:28,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:28,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:28,042 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:28,299 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 04:50:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:28,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:28,300 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:50:28,300 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:50:28,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:50:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-06-05 04:50:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.167741935483871) internal successors, (336), 155 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 336 transitions. [2021-06-05 04:50:28,301 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 336 transitions. Word has length 19 [2021-06-05 04:50:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:28,301 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 336 transitions. [2021-06-05 04:50:28,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 336 transitions. [2021-06-05 04:50:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:28,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:28,302 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:28,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16972 [2021-06-05 04:50:28,502 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2049107724, now seen corresponding path program 296 times [2021-06-05 04:50:28,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:28,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909963873] [2021-06-05 04:50:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:28,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909963873] [2021-06-05 04:50:28,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909963873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845466112] [2021-06-05 04:50:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:28,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:28,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:28,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:28,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:28,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:28,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,073 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:50:29,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:29,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:29,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:29,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:29,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:29,202 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:29,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:29,257 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:29,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:29,280 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:50:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845466112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:29,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:29,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272425267] [2021-06-05 04:50:29,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:29,313 INFO L87 Difference]: Start difference. First operand 156 states and 336 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:29,978 INFO L93 Difference]: Finished difference Result 211 states and 430 transitions. [2021-06-05 04:50:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:29,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:29,978 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:50:29,978 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:50:29,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:50:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-05 04:50:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1635220125786163) internal successors, (344), 159 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 344 transitions. [2021-06-05 04:50:29,980 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 344 transitions. Word has length 19 [2021-06-05 04:50:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:29,980 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 344 transitions. [2021-06-05 04:50:29,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 344 transitions. [2021-06-05 04:50:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:29,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:29,980 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:30,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16981 [2021-06-05 04:50:30,181 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1569823048, now seen corresponding path program 297 times [2021-06-05 04:50:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:30,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226865380] [2021-06-05 04:50:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:30,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:30,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226865380] [2021-06-05 04:50:30,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226865380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:30,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045126392] [2021-06-05 04:50:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:30,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:30,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:30,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:30,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:30,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,706 INFO L628 ElimStorePlain]: treesize reduction 71, result has 44.5 percent of original size [2021-06-05 04:50:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:30,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:30,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:30,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:30,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:30,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:30,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:30,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:30,792 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:50:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045126392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:30,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:30,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511710951] [2021-06-05 04:50:30,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:30,821 INFO L87 Difference]: Start difference. First operand 160 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:31,096 INFO L93 Difference]: Finished difference Result 194 states and 406 transitions. [2021-06-05 04:50:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:31,097 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:50:31,097 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:50:31,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:50:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2021-06-05 04:50:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.161290322580645) internal successors, (335), 155 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 335 transitions. [2021-06-05 04:50:31,099 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 335 transitions. Word has length 19 [2021-06-05 04:50:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:31,099 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 335 transitions. [2021-06-05 04:50:31,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 335 transitions. [2021-06-05 04:50:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:31,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:31,099 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:31,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17003 [2021-06-05 04:50:31,299 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -405838445, now seen corresponding path program 298 times [2021-06-05 04:50:31,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:31,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543910183] [2021-06-05 04:50:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:31,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543910183] [2021-06-05 04:50:31,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543910183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17449728] [2021-06-05 04:50:31,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:31,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:31,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17449728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:31,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:31,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298769603] [2021-06-05 04:50:31,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:31,542 INFO L87 Difference]: Start difference. First operand 156 states and 335 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:31,704 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-06-05 04:50:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:31,704 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:50:31,704 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:50:31,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:50:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2021-06-05 04:50:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 04:50:31,710 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 04:50:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:31,710 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 04:50:31,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 04:50:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:31,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:31,710 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:31,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17026,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:31,911 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1867476129, now seen corresponding path program 299 times [2021-06-05 04:50:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:31,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733550433] [2021-06-05 04:50:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:31,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733550433] [2021-06-05 04:50:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733550433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272855155] [2021-06-05 04:50:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:32,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:32,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272855155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625247503] [2021-06-05 04:50:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:32,152 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:32,337 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2021-06-05 04:50:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:50:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:32,338 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:50:32,338 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:50:32,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:50:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-06-05 04:50:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 04:50:32,339 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 04:50:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:32,339 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 04:50:32,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 04:50:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:32,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:32,340 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:32,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17036 [2021-06-05 04:50:32,540 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1858313295, now seen corresponding path program 300 times [2021-06-05 04:50:32,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:32,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122337156] [2021-06-05 04:50:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:32,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122337156] [2021-06-05 04:50:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122337156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596293361] [2021-06-05 04:50:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:32,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:32,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:32,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596293361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:32,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:32,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385032221] [2021-06-05 04:50:32,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:32,885 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:33,104 INFO L93 Difference]: Finished difference Result 200 states and 420 transitions. [2021-06-05 04:50:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:50:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:33,105 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:50:33,105 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:50:33,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:50:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 157. [2021-06-05 04:50:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 04:50:33,106 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 04:50:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 04:50:33,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 04:50:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:33,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:33,107 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:33,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:33,307 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1051476255, now seen corresponding path program 301 times [2021-06-05 04:50:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:33,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202845306] [2021-06-05 04:50:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:33,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:33,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202845306] [2021-06-05 04:50:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202845306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:33,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868306082] [2021-06-05 04:50:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:33,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868306082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:33,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:33,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:33,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669080196] [2021-06-05 04:50:33,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:33,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:33,543 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:33,708 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2021-06-05 04:50:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:50:33,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:33,708 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:50:33,708 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:50:33,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:50:33,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2021-06-05 04:50:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 04:50:33,710 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 04:50:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:33,710 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 04:50:33,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 04:50:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:33,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:33,710 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:33,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17070,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:33,911 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1735682165, now seen corresponding path program 302 times [2021-06-05 04:50:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:33,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654201380] [2021-06-05 04:50:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:33,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654201380] [2021-06-05 04:50:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654201380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794740914] [2021-06-05 04:50:33,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:34,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:34,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:34,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794740914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:34,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:34,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79186215] [2021-06-05 04:50:34,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:34,150 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:34,291 INFO L93 Difference]: Finished difference Result 195 states and 411 transitions. [2021-06-05 04:50:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:50:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:34,291 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:50:34,291 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:50:34,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:50:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 159. [2021-06-05 04:50:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.151898734177215) internal successors, (340), 158 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 340 transitions. [2021-06-05 04:50:34,293 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 340 transitions. Word has length 19 [2021-06-05 04:50:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:34,293 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 340 transitions. [2021-06-05 04:50:34,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 340 transitions. [2021-06-05 04:50:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:34,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:34,293 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:34,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17074,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:34,493 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -410375946, now seen corresponding path program 303 times [2021-06-05 04:50:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888364448] [2021-06-05 04:50:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:34,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888364448] [2021-06-05 04:50:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888364448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855213099] [2021-06-05 04:50:34,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:34,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:34,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:34,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:34,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:34,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,907 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-06-05 04:50:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:34,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:34,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:34,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:34,971 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:50:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:34,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855213099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:34,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:34,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:34,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044720540] [2021-06-05 04:50:34,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:34,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:34,999 INFO L87 Difference]: Start difference. First operand 159 states and 340 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:35,206 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2021-06-05 04:50:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:35,207 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:50:35,207 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:50:35,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:50:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2021-06-05 04:50:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 04:50:35,208 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 04:50:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:35,208 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 04:50:35,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 04:50:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:35,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:35,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:35,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17083,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:35,409 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash 324225371, now seen corresponding path program 304 times [2021-06-05 04:50:35,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:35,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543806546] [2021-06-05 04:50:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:35,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543806546] [2021-06-05 04:50:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543806546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586104031] [2021-06-05 04:50:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:35,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:35,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:35,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586104031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:35,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:35,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134514696] [2021-06-05 04:50:35,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:35,747 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:35,976 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 04:50:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:50:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:35,976 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:50:35,976 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:50:35,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:50:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2021-06-05 04:50:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 04:50:35,978 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 04:50:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:35,978 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 04:50:35,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 04:50:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:35,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:35,978 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:36,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17107,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:36,179 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1060952375, now seen corresponding path program 305 times [2021-06-05 04:50:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:36,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837781432] [2021-06-05 04:50:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:36,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837781432] [2021-06-05 04:50:36,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837781432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095183756] [2021-06-05 04:50:36,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:36,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095183756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:36,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:36,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:36,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192728329] [2021-06-05 04:50:36,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:36,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:36,512 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:36,869 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-05 04:50:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:50:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:36,870 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:50:36,870 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:50:36,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:50:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 157. [2021-06-05 04:50:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 04:50:36,872 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 04:50:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:36,872 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 04:50:36,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 04:50:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:36,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:36,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:37,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17137 [2021-06-05 04:50:37,073 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -376746465, now seen corresponding path program 306 times [2021-06-05 04:50:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:37,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422539533] [2021-06-05 04:50:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:37,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:37,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422539533] [2021-06-05 04:50:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422539533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:37,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294935107] [2021-06-05 04:50:37,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:37,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:50:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294935107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:37,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:37,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559646379] [2021-06-05 04:50:37,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:37,423 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:37,821 INFO L93 Difference]: Finished difference Result 221 states and 463 transitions. [2021-06-05 04:50:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:50:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:37,821 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:50:37,821 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:50:37,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:50:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:50:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2021-06-05 04:50:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 04:50:37,823 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 04:50:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:37,823 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 04:50:37,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 04:50:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:37,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:37,823 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17166 [2021-06-05 04:50:38,024 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1772162720, now seen corresponding path program 307 times [2021-06-05 04:50:38,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:38,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906567818] [2021-06-05 04:50:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:38,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906567818] [2021-06-05 04:50:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906567818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:38,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432199717] [2021-06-05 04:50:38,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:38,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:38,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:38,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:38,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,462 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:50:38,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:38,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:38,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:38,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:38,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:38,593 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:38,622 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:38,650 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:38,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:38,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:38,679 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:50:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:38,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432199717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:38,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:38,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:38,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4823455] [2021-06-05 04:50:38,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:38,708 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:38,945 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 04:50:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:38,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:38,945 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:50:38,945 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:50:38,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:50:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2021-06-05 04:50:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 04:50:38,947 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 04:50:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:38,947 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 04:50:38,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 04:50:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:38,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:38,947 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:39,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17198,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:39,148 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -20716577, now seen corresponding path program 308 times [2021-06-05 04:50:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:39,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008070808] [2021-06-05 04:50:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:39,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008070808] [2021-06-05 04:50:39,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008070808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223685160] [2021-06-05 04:50:39,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:39,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:39,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223685160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:39,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:39,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664346439] [2021-06-05 04:50:39,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:39,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:39,438 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:39,785 INFO L93 Difference]: Finished difference Result 205 states and 430 transitions. [2021-06-05 04:50:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:50:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:39,785 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:50:39,785 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:50:39,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:50:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2021-06-05 04:50:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1481481481481484) internal successors, (348), 162 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 348 transitions. [2021-06-05 04:50:39,787 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 348 transitions. Word has length 19 [2021-06-05 04:50:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:39,787 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 348 transitions. [2021-06-05 04:50:39,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 348 transitions. [2021-06-05 04:50:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:39,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:39,787 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:39,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17220 [2021-06-05 04:50:39,988 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:39,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1035231055, now seen corresponding path program 309 times [2021-06-05 04:50:39,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:39,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913931251] [2021-06-05 04:50:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:40,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913931251] [2021-06-05 04:50:40,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913931251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334732482] [2021-06-05 04:50:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:40,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334732482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:40,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:40,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199904851] [2021-06-05 04:50:40,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:40,346 INFO L87 Difference]: Start difference. First operand 163 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:40,749 INFO L93 Difference]: Finished difference Result 230 states and 481 transitions. [2021-06-05 04:50:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:50:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:40,749 INFO L225 Difference]: With dead ends: 230 [2021-06-05 04:50:40,749 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:50:40,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:50:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:50:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 162. [2021-06-05 04:50:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 04:50:40,751 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 04:50:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:40,751 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 04:50:40,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 04:50:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:40,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:40,752 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:40,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17240,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:40,952 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1482568778, now seen corresponding path program 310 times [2021-06-05 04:50:40,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:40,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073474500] [2021-06-05 04:50:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:41,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073474500] [2021-06-05 04:50:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073474500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683597835] [2021-06-05 04:50:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:41,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:41,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:41,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:41,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:41,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,355 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:50:41,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:41,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:41,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:41,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:41,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:41,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:41,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:41,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:41,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:41,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:41,561 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:50:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:41,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683597835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:41,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:41,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953636754] [2021-06-05 04:50:41,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:41,589 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:41,871 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 04:50:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:41,871 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:50:41,871 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:50:41,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:50:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 160. [2021-06-05 04:50:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 04:50:41,873 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 04:50:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:41,873 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 04:50:41,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 04:50:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:41,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:41,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:42,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17284,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:42,074 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash -447485733, now seen corresponding path program 311 times [2021-06-05 04:50:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:42,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042746218] [2021-06-05 04:50:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:42,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042746218] [2021-06-05 04:50:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042746218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790791245] [2021-06-05 04:50:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:42,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:42,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:42,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790791245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:42,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:42,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316225462] [2021-06-05 04:50:42,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:42,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:42,411 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:42,640 INFO L93 Difference]: Finished difference Result 213 states and 442 transitions. [2021-06-05 04:50:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:50:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:42,640 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:50:42,640 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:50:42,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:50:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:50:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 162. [2021-06-05 04:50:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1614906832298137) internal successors, (348), 161 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 348 transitions. [2021-06-05 04:50:42,642 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 348 transitions. Word has length 19 [2021-06-05 04:50:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:42,642 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 348 transitions. [2021-06-05 04:50:42,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 348 transitions. [2021-06-05 04:50:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:42,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:42,642 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:42,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17306 [2021-06-05 04:50:42,843 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:42,843 INFO L82 PathProgramCache]: Analyzing trace with hash -894823456, now seen corresponding path program 312 times [2021-06-05 04:50:42,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:42,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788584031] [2021-06-05 04:50:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:42,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788584031] [2021-06-05 04:50:42,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788584031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840539689] [2021-06-05 04:50:42,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:43,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:50:43,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:43,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:43,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:43,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:43,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:43,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:43,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:43,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:43,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:43,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:43,252 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,282 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:50:43,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:43,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:43,307 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:50:43,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:43,308 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:50:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840539689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:43,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:43,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251197053] [2021-06-05 04:50:43,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:43,330 INFO L87 Difference]: Start difference. First operand 162 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:43,672 INFO L93 Difference]: Finished difference Result 248 states and 509 transitions. [2021-06-05 04:50:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:50:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:43,673 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:50:43,673 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 04:50:43,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 04:50:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 159. [2021-06-05 04:50:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 04:50:43,675 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 04:50:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:43,675 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 04:50:43,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 04:50:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:43,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:43,675 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:43,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17342 [2021-06-05 04:50:43,876 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1430053258, now seen corresponding path program 313 times [2021-06-05 04:50:43,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:43,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172593547] [2021-06-05 04:50:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:43,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:43,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172593547] [2021-06-05 04:50:43,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172593547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:43,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036549377] [2021-06-05 04:50:43,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:44,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:44,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:44,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:44,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:44,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:44,186 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:50:44,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:44,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:44,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:44,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:50:44,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:50:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036549377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:44,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:44,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752464100] [2021-06-05 04:50:44,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:44,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:44,199 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:44,444 INFO L93 Difference]: Finished difference Result 202 states and 425 transitions. [2021-06-05 04:50:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:44,444 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:50:44,444 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:50:44,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:50:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2021-06-05 04:50:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.16025641025641) internal successors, (337), 156 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 337 transitions. [2021-06-05 04:50:44,446 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 337 transitions. Word has length 19 [2021-06-05 04:50:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:44,446 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 337 transitions. [2021-06-05 04:50:44,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 337 transitions. [2021-06-05 04:50:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:44,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:44,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:44,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17427,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:44,647 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1794773793, now seen corresponding path program 314 times [2021-06-05 04:50:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:44,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284749668] [2021-06-05 04:50:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:44,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:44,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284749668] [2021-06-05 04:50:44,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284749668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:44,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659850205] [2021-06-05 04:50:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:44,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:44,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659850205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:44,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:44,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:44,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478343000] [2021-06-05 04:50:44,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:44,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:44,960 INFO L87 Difference]: Start difference. First operand 157 states and 337 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:45,206 INFO L93 Difference]: Finished difference Result 175 states and 368 transitions. [2021-06-05 04:50:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:50:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:45,207 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:50:45,207 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:50:45,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:50:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-06-05 04:50:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 04:50:45,208 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 04:50:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:45,208 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 04:50:45,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 04:50:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:45,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:45,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:45,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17450,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:45,409 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1170864497, now seen corresponding path program 315 times [2021-06-05 04:50:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169687535] [2021-06-05 04:50:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:45,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169687535] [2021-06-05 04:50:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169687535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478871343] [2021-06-05 04:50:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:45,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:45,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:45,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478871343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:45,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:45,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:50:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552352616] [2021-06-05 04:50:45,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:45,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:45,645 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:45,796 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 04:50:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:45,796 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:50:45,796 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:50:45,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:50:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 04:50:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 04:50:45,798 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 04:50:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:45,798 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 04:50:45,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 04:50:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:45,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:45,798 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:45,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-06-05 04:50:45,999 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1180027331, now seen corresponding path program 316 times [2021-06-05 04:50:45,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:45,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353968861] [2021-06-05 04:50:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:46,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:46,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353968861] [2021-06-05 04:50:46,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353968861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:46,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564160915] [2021-06-05 04:50:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:46,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:46,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564160915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:46,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:46,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:46,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605353312] [2021-06-05 04:50:46,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:46,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:46,251 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:46,454 INFO L93 Difference]: Finished difference Result 205 states and 431 transitions. [2021-06-05 04:50:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:46,454 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:50:46,454 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:50:46,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:50:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2021-06-05 04:50:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.151898734177215) internal successors, (340), 158 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 340 transitions. [2021-06-05 04:50:46,456 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 340 transitions. Word has length 19 [2021-06-05 04:50:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:46,456 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 340 transitions. [2021-06-05 04:50:46,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 340 transitions. [2021-06-05 04:50:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:46,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:46,456 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:46,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17472 [2021-06-05 04:50:46,670 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash -205150415, now seen corresponding path program 317 times [2021-06-05 04:50:46,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:46,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380789770] [2021-06-05 04:50:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:46,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380789770] [2021-06-05 04:50:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380789770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560052173] [2021-06-05 04:50:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:46,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:47,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560052173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:47,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:47,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:50:47,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745506385] [2021-06-05 04:50:47,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:50:47,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:47,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:50:47,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:50:47,009 INFO L87 Difference]: Start difference. First operand 159 states and 340 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:47,388 INFO L93 Difference]: Finished difference Result 220 states and 461 transitions. [2021-06-05 04:50:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:50:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:47,389 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:50:47,389 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:50:47,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:50:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2021-06-05 04:50:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 04:50:47,391 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 04:50:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:47,391 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 04:50:47,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 04:50:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:47,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:47,391 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:47,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17476 [2021-06-05 04:50:47,592 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:47,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1219664893, now seen corresponding path program 318 times [2021-06-05 04:50:47,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:47,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137361271] [2021-06-05 04:50:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:47,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137361271] [2021-06-05 04:50:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137361271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:47,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117957267] [2021-06-05 04:50:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:47,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:50:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:47,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117957267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:47,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:47,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:50:47,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443774220] [2021-06-05 04:50:47,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:50:47,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:50:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:50:47,833 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:48,080 INFO L93 Difference]: Finished difference Result 215 states and 451 transitions. [2021-06-05 04:50:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:48,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:48,080 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:50:48,080 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:50:48,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:50:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 161. [2021-06-05 04:50:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.15) internal successors, (344), 160 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 344 transitions. [2021-06-05 04:50:48,082 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 344 transitions. Word has length 19 [2021-06-05 04:50:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:48,082 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 344 transitions. [2021-06-05 04:50:48,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 344 transitions. [2021-06-05 04:50:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:48,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:48,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:48,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17497 [2021-06-05 04:50:48,283 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1667002616, now seen corresponding path program 319 times [2021-06-05 04:50:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:48,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072077514] [2021-06-05 04:50:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:48,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:48,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072077514] [2021-06-05 04:50:48,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072077514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:48,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329308640] [2021-06-05 04:50:48,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:48,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:48,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:48,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,779 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:50:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,906 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,960 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:48,983 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:50:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329308640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:50:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288360872] [2021-06-05 04:50:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:50:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:50:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:50:49,012 INFO L87 Difference]: Start difference. First operand 161 states and 344 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:49,224 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 04:50:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:49,224 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:50:49,224 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:50:49,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:50:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 157. [2021-06-05 04:50:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 04:50:49,226 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 04:50:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:49,226 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 04:50:49,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 04:50:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:49,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:49,226 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:49,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17507,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:49,427 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1993179389, now seen corresponding path program 320 times [2021-06-05 04:50:49,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:49,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778136028] [2021-06-05 04:50:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:49,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778136028] [2021-06-05 04:50:49,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778136028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259680188] [2021-06-05 04:50:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:49,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:49,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259680188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:49,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:50:49,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122032307] [2021-06-05 04:50:49,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:50:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:50:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:49,751 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:49,969 INFO L93 Difference]: Finished difference Result 211 states and 443 transitions. [2021-06-05 04:50:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:49,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:49,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:49,970 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:50:49,970 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:50:49,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:50:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2021-06-05 04:50:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 04:50:49,972 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 04:50:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:49,972 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 04:50:49,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 04:50:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:49,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:49,972 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17530,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:50,172 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash 916610161, now seen corresponding path program 321 times [2021-06-05 04:50:50,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:50,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038464234] [2021-06-05 04:50:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:50,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038464234] [2021-06-05 04:50:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038464234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292550149] [2021-06-05 04:50:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:50:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292550149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:50,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:50,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656814126] [2021-06-05 04:50:50,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:50,505 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:50,865 INFO L93 Difference]: Finished difference Result 232 states and 485 transitions. [2021-06-05 04:50:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:50:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:50,866 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:50:50,866 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:50:50,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:50:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:50:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 162. [2021-06-05 04:50:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 04:50:50,867 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 04:50:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:50,867 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 04:50:50,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 04:50:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:50,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:50,868 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:51,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17549,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:51,068 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash -97904317, now seen corresponding path program 322 times [2021-06-05 04:50:51,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:51,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071749494] [2021-06-05 04:50:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:51,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:51,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071749494] [2021-06-05 04:50:51,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071749494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:51,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586700955] [2021-06-05 04:50:51,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:51,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:51,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586700955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:51,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:51,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:51,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793176040] [2021-06-05 04:50:51,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:51,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:51,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:51,521 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:52,048 INFO L93 Difference]: Finished difference Result 246 states and 514 transitions. [2021-06-05 04:50:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:50:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:52,049 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:50:52,049 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:50:52,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:50:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:50:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 160. [2021-06-05 04:50:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 04:50:52,051 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 04:50:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:52,051 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 04:50:52,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 04:50:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:52,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:52,051 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:52,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17580,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:52,252 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -545242040, now seen corresponding path program 323 times [2021-06-05 04:50:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:52,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722402251] [2021-06-05 04:50:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:52,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722402251] [2021-06-05 04:50:52,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722402251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027419216] [2021-06-05 04:50:52,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:52,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:52,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:52,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:52,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:52,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:52,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:52,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:52,669 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 04:50:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:52,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:52,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:52,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:52,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:52,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:52,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:52,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:52,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:52,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:52,733 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:50:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:52,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027419216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:52,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:52,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:50:52,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114923071] [2021-06-05 04:50:52,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:50:52,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:50:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:52,762 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:52,987 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 04:50:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:50:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:52,988 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:50:52,988 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:50:52,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:50:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-06-05 04:50:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 04:50:52,989 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 04:50:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:52,989 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 04:50:52,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 04:50:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:52,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:52,990 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:53,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17651 [2021-06-05 04:50:53,190 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -155582671, now seen corresponding path program 324 times [2021-06-05 04:50:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:53,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873413597] [2021-06-05 04:50:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:53,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873413597] [2021-06-05 04:50:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873413597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024988719] [2021-06-05 04:50:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:53,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024988719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:53,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222863187] [2021-06-05 04:50:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:53,512 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:53,759 INFO L93 Difference]: Finished difference Result 207 states and 435 transitions. [2021-06-05 04:50:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:50:53,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:53,760 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:50:53,760 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:50:53,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:50:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2021-06-05 04:50:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 04:50:53,761 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 04:50:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 04:50:53,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 04:50:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:53,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:53,762 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:53,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17674 [2021-06-05 04:50:53,965 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 528623239, now seen corresponding path program 325 times [2021-06-05 04:50:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:53,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937856901] [2021-06-05 04:50:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:54,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937856901] [2021-06-05 04:50:54,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937856901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106990939] [2021-06-05 04:50:54,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:54,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106990939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:54,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:54,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666138896] [2021-06-05 04:50:54,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:54,305 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:54,541 INFO L93 Difference]: Finished difference Result 229 states and 480 transitions. [2021-06-05 04:50:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:50:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:54,542 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:50:54,542 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:50:54,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:50:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2021-06-05 04:50:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 04:50:54,544 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 04:50:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:54,544 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 04:50:54,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 04:50:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:54,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:54,544 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:54,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17704 [2021-06-05 04:50:54,745 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1617434872, now seen corresponding path program 326 times [2021-06-05 04:50:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:54,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974384851] [2021-06-05 04:50:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:54,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:54,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974384851] [2021-06-05 04:50:54,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974384851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:54,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920282619] [2021-06-05 04:50:54,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:54,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:55,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:55,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:55,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:55,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,155 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-06-05 04:50:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:55,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:55,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:55,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:55,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:55,287 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:55,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:55,341 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:55,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:55,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:55,364 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:50:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:55,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920282619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:55,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:55,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:55,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014329296] [2021-06-05 04:50:55,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:55,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:55,391 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:55,606 INFO L93 Difference]: Finished difference Result 190 states and 404 transitions. [2021-06-05 04:50:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:50:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:55,607 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:50:55,607 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:50:55,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:50:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-06-05 04:50:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 04:50:55,609 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 04:50:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:55,609 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 04:50:55,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 04:50:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:55,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:55,609 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:55,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17743 [2021-06-05 04:50:55,809 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash -582351827, now seen corresponding path program 327 times [2021-06-05 04:50:55,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:55,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191353028] [2021-06-05 04:50:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:55,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191353028] [2021-06-05 04:50:55,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191353028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803276766] [2021-06-05 04:50:55,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:55,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:55,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803276766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:56,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:56,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:56,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593710841] [2021-06-05 04:50:56,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:56,168 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:56,387 INFO L93 Difference]: Finished difference Result 202 states and 419 transitions. [2021-06-05 04:50:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:56,388 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:50:56,388 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:50:56,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:50:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:50:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 158. [2021-06-05 04:50:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.159235668789809) internal successors, (339), 157 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 339 transitions. [2021-06-05 04:50:56,389 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 339 transitions. Word has length 19 [2021-06-05 04:50:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:56,389 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 339 transitions. [2021-06-05 04:50:56,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 339 transitions. [2021-06-05 04:50:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:56,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:56,390 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:56,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17764,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:56,590 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1029689550, now seen corresponding path program 328 times [2021-06-05 04:50:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:56,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171291250] [2021-06-05 04:50:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:56,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:56,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171291250] [2021-06-05 04:50:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171291250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:56,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998304251] [2021-06-05 04:50:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:56,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:56,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:56,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:56,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:56,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:56,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:56,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:56,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:56,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:56,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:56,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:56,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:56,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:56,941 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:50:56,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:56,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:56,966 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:50:56,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:50:56,967 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:50:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998304251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:56,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:56,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:56,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431506541] [2021-06-05 04:50:56,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:56,989 INFO L87 Difference]: Start difference. First operand 158 states and 339 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:57,381 INFO L93 Difference]: Finished difference Result 239 states and 490 transitions. [2021-06-05 04:50:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:50:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:57,382 INFO L225 Difference]: With dead ends: 239 [2021-06-05 04:50:57,382 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 04:50:57,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:50:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 04:50:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2021-06-05 04:50:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 04:50:57,383 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 04:50:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:57,383 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 04:50:57,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 04:50:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:57,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:57,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:57,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17800,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:57,584 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1564919352, now seen corresponding path program 329 times [2021-06-05 04:50:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:57,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868150643] [2021-06-05 04:50:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:57,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:57,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868150643] [2021-06-05 04:50:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868150643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204507453] [2021-06-05 04:50:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:57,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:50:57,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:57,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:57,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:57,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:57,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:57,893 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:50:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:57,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:57,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:57,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:50:57,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:50:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:57,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204507453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:57,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:57,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860695013] [2021-06-05 04:50:57,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:57,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:57,907 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:58,159 INFO L93 Difference]: Finished difference Result 196 states and 414 transitions. [2021-06-05 04:50:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:50:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:58,160 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:50:58,160 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:50:58,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:50:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2021-06-05 04:50:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.16025641025641) internal successors, (337), 156 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 337 transitions. [2021-06-05 04:50:58,162 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 337 transitions. Word has length 19 [2021-06-05 04:50:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:58,162 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 337 transitions. [2021-06-05 04:50:58,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 337 transitions. [2021-06-05 04:50:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:58,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:58,162 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:58,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17839,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:58,363 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:58,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1929639887, now seen corresponding path program 330 times [2021-06-05 04:50:58,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:58,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609470388] [2021-06-05 04:50:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:58,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609470388] [2021-06-05 04:50:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609470388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358212711] [2021-06-05 04:50:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:58,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:50:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358212711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421000213] [2021-06-05 04:50:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:58,695 INFO L87 Difference]: Start difference. First operand 157 states and 337 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:58,889 INFO L93 Difference]: Finished difference Result 172 states and 362 transitions. [2021-06-05 04:50:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:58,889 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:50:58,889 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:50:58,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:50:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2021-06-05 04:50:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 04:50:58,891 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 04:50:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:58,891 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 04:50:58,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 04:50:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:58,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:58,891 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:59,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17861 [2021-06-05 04:50:59,092 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash 457883971, now seen corresponding path program 331 times [2021-06-05 04:50:59,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:59,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728460369] [2021-06-05 04:50:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:59,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:59,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728460369] [2021-06-05 04:50:59,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728460369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:59,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306302524] [2021-06-05 04:50:59,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:50:59,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306302524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:59,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:50:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648464975] [2021-06-05 04:50:59,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:50:59,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:59,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:50:59,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:50:59,483 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:59,740 INFO L93 Difference]: Finished difference Result 209 states and 436 transitions. [2021-06-05 04:50:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:50:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:50:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:59,741 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:50:59,741 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:50:59,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:50:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:50:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 156. [2021-06-05 04:50:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.167741935483871) internal successors, (336), 155 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 336 transitions. [2021-06-05 04:50:59,742 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 336 transitions. Word has length 19 [2021-06-05 04:50:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:59,743 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 336 transitions. [2021-06-05 04:50:59,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 336 transitions. [2021-06-05 04:50:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:50:59,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:59,743 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:59,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17888,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:59,944 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:59,944 INFO L82 PathProgramCache]: Analyzing trace with hash 10546248, now seen corresponding path program 332 times [2021-06-05 04:50:59,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:59,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869469530] [2021-06-05 04:50:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:00,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869469530] [2021-06-05 04:51:00,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869469530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655226838] [2021-06-05 04:51:00,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:00,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:00,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:00,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:00,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:00,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:00,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:00,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:00,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:00,399 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:00,401 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,453 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:00,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:00,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:00,478 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:00,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:00,479 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:00,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655226838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:00,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:00,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:51:00,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865324798] [2021-06-05 04:51:00,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:00,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:00,500 INFO L87 Difference]: Start difference. First operand 156 states and 336 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:00,983 INFO L93 Difference]: Finished difference Result 244 states and 499 transitions. [2021-06-05 04:51:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:51:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:00,984 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:51:00,984 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:51:00,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:51:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:51:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2021-06-05 04:51:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-06-05 04:51:00,986 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-06-05 04:51:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:00,986 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-06-05 04:51:00,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-06-05 04:51:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:00,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:00,987 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:01,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17946 [2021-06-05 04:51:01,201 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:01,201 INFO L82 PathProgramCache]: Analyzing trace with hash -524683554, now seen corresponding path program 333 times [2021-06-05 04:51:01,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:01,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889881364] [2021-06-05 04:51:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:01,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889881364] [2021-06-05 04:51:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889881364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223331858] [2021-06-05 04:51:01,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:01,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:01,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:01,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:01,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:01,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:01,514 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:01,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:01,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:01,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:01,521 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:51:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:01,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223331858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:01,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:01,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:51:01,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741728340] [2021-06-05 04:51:01,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:01,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:01,527 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:01,825 INFO L93 Difference]: Finished difference Result 200 states and 421 transitions. [2021-06-05 04:51:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:01,825 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:51:01,825 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:51:01,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:51:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2021-06-05 04:51:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-06-05 04:51:01,827 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-06-05 04:51:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:01,827 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-06-05 04:51:01,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-06-05 04:51:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:01,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:01,827 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:02,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18057,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:02,028 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash -889404089, now seen corresponding path program 334 times [2021-06-05 04:51:02,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:02,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625621837] [2021-06-05 04:51:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:02,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:02,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625621837] [2021-06-05 04:51:02,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625621837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:02,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932075318] [2021-06-05 04:51:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:02,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:02,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:02,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932075318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:02,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:02,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:51:02,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684160759] [2021-06-05 04:51:02,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:02,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:02,337 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:02,623 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 04:51:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:02,623 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:51:02,623 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:51:02,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:51:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 157. [2021-06-05 04:51:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1858974358974357) internal successors, (341), 156 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 341 transitions. [2021-06-05 04:51:02,625 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 341 transitions. Word has length 19 [2021-06-05 04:51:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:02,625 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 341 transitions. [2021-06-05 04:51:02,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 341 transitions. [2021-06-05 04:51:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:02,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:02,625 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:02,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18080,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:02,826 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash 63061768, now seen corresponding path program 335 times [2021-06-05 04:51:02,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:02,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187841261] [2021-06-05 04:51:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:02,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:02,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187841261] [2021-06-05 04:51:02,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187841261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:02,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370456479] [2021-06-05 04:51:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:02,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:03,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:03,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:03,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:03,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:03,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,165 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:03,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:03,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:03,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:03,172 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:03,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370456479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:03,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:03,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:51:03,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567344251] [2021-06-05 04:51:03,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:03,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:03,178 INFO L87 Difference]: Start difference. First operand 157 states and 341 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:03,422 INFO L93 Difference]: Finished difference Result 194 states and 411 transitions. [2021-06-05 04:51:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:03,422 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:51:03,422 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:51:03,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:51:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2021-06-05 04:51:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-06-05 04:51:03,424 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-06-05 04:51:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:03,424 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-06-05 04:51:03,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-06-05 04:51:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:03,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:03,424 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18098,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:03,625 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1902096621, now seen corresponding path program 336 times [2021-06-05 04:51:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373848524] [2021-06-05 04:51:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:03,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:03,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373848524] [2021-06-05 04:51:03,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373848524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:03,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903081982] [2021-06-05 04:51:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:03,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:03,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903081982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:03,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:03,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:51:03,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025126206] [2021-06-05 04:51:03,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:03,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:03,919 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:04,103 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2021-06-05 04:51:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:04,104 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:51:04,104 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:51:04,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:51:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-06-05 04:51:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 04:51:04,105 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 04:51:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:04,105 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 04:51:04,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 04:51:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:04,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:04,106 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:04,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18139 [2021-06-05 04:51:04,306 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 870143391, now seen corresponding path program 337 times [2021-06-05 04:51:04,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:04,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523175899] [2021-06-05 04:51:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:04,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523175899] [2021-06-05 04:51:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523175899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640592773] [2021-06-05 04:51:04,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640592773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:04,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:04,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:04,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934282039] [2021-06-05 04:51:04,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:04,630 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:04,806 INFO L93 Difference]: Finished difference Result 183 states and 392 transitions. [2021-06-05 04:51:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:04,807 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:51:04,807 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:51:04,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:51:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 160. [2021-06-05 04:51:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 04:51:04,808 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 04:51:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:04,808 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 04:51:04,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 04:51:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:04,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:04,809 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:05,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18158 [2021-06-05 04:51:05,009 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash 879306225, now seen corresponding path program 338 times [2021-06-05 04:51:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:05,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572538670] [2021-06-05 04:51:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572538670] [2021-06-05 04:51:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572538670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775322323] [2021-06-05 04:51:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:05,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:05,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775322323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:05,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:05,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:05,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953506472] [2021-06-05 04:51:05,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:05,366 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:05,647 INFO L93 Difference]: Finished difference Result 205 states and 436 transitions. [2021-06-05 04:51:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:05,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:05,647 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:51:05,647 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:51:05,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:51:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 161. [2021-06-05 04:51:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.175) internal successors, (348), 160 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 348 transitions. [2021-06-05 04:51:05,649 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 348 transitions. Word has length 19 [2021-06-05 04:51:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:05,649 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 348 transitions. [2021-06-05 04:51:05,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 348 transitions. [2021-06-05 04:51:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:05,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:05,649 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:05,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18174,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:05,850 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash -505871521, now seen corresponding path program 339 times [2021-06-05 04:51:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:05,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842774742] [2021-06-05 04:51:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:05,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:05,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842774742] [2021-06-05 04:51:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842774742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:05,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889429951] [2021-06-05 04:51:05,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:06,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889429951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:06,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:06,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:06,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217551948] [2021-06-05 04:51:06,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:06,216 INFO L87 Difference]: Start difference. First operand 161 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:06,654 INFO L93 Difference]: Finished difference Result 215 states and 456 transitions. [2021-06-05 04:51:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:06,655 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:51:06,655 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:51:06,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:51:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2021-06-05 04:51:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1739130434782608) internal successors, (350), 161 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 350 transitions. [2021-06-05 04:51:06,656 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 350 transitions. Word has length 19 [2021-06-05 04:51:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:06,656 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 350 transitions. [2021-06-05 04:51:06,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 350 transitions. [2021-06-05 04:51:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:06,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:06,657 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:06,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18193,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:06,857 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1520385999, now seen corresponding path program 340 times [2021-06-05 04:51:06,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:06,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804216102] [2021-06-05 04:51:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:06,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804216102] [2021-06-05 04:51:06,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804216102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774848327] [2021-06-05 04:51:06,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:07,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:07,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:07,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774848327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:07,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:07,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615840353] [2021-06-05 04:51:07,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:07,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:07,313 INFO L87 Difference]: Start difference. First operand 162 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:07,761 INFO L93 Difference]: Finished difference Result 220 states and 466 transitions. [2021-06-05 04:51:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:07,762 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:51:07,762 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:51:07,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:51:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2021-06-05 04:51:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 04:51:07,763 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 04:51:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:07,763 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 04:51:07,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 04:51:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:07,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:07,764 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:07,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18219,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:07,964 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1233122405, now seen corresponding path program 341 times [2021-06-05 04:51:07,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:07,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215401904] [2021-06-05 04:51:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:08,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:08,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215401904] [2021-06-05 04:51:08,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215401904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817128674] [2021-06-05 04:51:08,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:08,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:08,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:08,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817128674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:08,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:08,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897801592] [2021-06-05 04:51:08,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:08,285 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:08,472 INFO L93 Difference]: Finished difference Result 194 states and 414 transitions. [2021-06-05 04:51:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:08,473 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:51:08,473 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:51:08,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:51:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2021-06-05 04:51:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 04:51:08,474 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 04:51:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:08,474 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 04:51:08,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 04:51:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:08,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:08,475 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:08,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18288,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:08,675 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1676667145, now seen corresponding path program 342 times [2021-06-05 04:51:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:08,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857410742] [2021-06-05 04:51:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:08,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:08,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857410742] [2021-06-05 04:51:08,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857410742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219648318] [2021-06-05 04:51:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:08,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:09,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219648318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:09,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:09,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:09,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041357238] [2021-06-05 04:51:09,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:09,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:09,027 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:09,381 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-06-05 04:51:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:09,381 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:51:09,381 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:51:09,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:51:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 161. [2021-06-05 04:51:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.175) internal successors, (348), 160 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 348 transitions. [2021-06-05 04:51:09,383 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 348 transitions. Word has length 19 [2021-06-05 04:51:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:09,383 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 348 transitions. [2021-06-05 04:51:09,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 348 transitions. [2021-06-05 04:51:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:09,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:09,383 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18304 [2021-06-05 04:51:09,584 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1934094241, now seen corresponding path program 343 times [2021-06-05 04:51:09,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:09,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74222880] [2021-06-05 04:51:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:09,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74222880] [2021-06-05 04:51:09,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74222880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966038025] [2021-06-05 04:51:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966038025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:10,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:10,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:10,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125359441] [2021-06-05 04:51:10,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:10,001 INFO L87 Difference]: Start difference. First operand 161 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:10,386 INFO L93 Difference]: Finished difference Result 221 states and 469 transitions. [2021-06-05 04:51:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:10,386 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:51:10,386 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:51:10,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:51:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2021-06-05 04:51:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1739130434782608) internal successors, (350), 161 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 350 transitions. [2021-06-05 04:51:10,388 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 350 transitions. Word has length 19 [2021-06-05 04:51:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:10,388 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 350 transitions. [2021-06-05 04:51:10,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 350 transitions. [2021-06-05 04:51:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:10,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:10,388 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:10,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18330,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:10,589 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash 214814944, now seen corresponding path program 344 times [2021-06-05 04:51:10,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:10,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137808197] [2021-06-05 04:51:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:10,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137808197] [2021-06-05 04:51:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137808197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664867806] [2021-06-05 04:51:10,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:10,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:10,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:10,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:10,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:10,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,015 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-06-05 04:51:11,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:11,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:11,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:11,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:11,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:11,077 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:51:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664867806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:11,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:11,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:11,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808143417] [2021-06-05 04:51:11,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:11,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:11,106 INFO L87 Difference]: Start difference. First operand 162 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:11,286 INFO L93 Difference]: Finished difference Result 173 states and 372 transitions. [2021-06-05 04:51:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:11,287 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:51:11,287 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:51:11,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:51:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 157. [2021-06-05 04:51:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1794871794871793) internal successors, (340), 156 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 340 transitions. [2021-06-05 04:51:11,289 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 340 transitions. Word has length 19 [2021-06-05 04:51:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:11,289 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 340 transitions. [2021-06-05 04:51:11,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 340 transitions. [2021-06-05 04:51:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:11,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:11,289 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:11,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18380 [2021-06-05 04:51:11,489 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash -237659338, now seen corresponding path program 345 times [2021-06-05 04:51:11,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:11,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289414288] [2021-06-05 04:51:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:11,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289414288] [2021-06-05 04:51:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289414288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730495284] [2021-06-05 04:51:11,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:11,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:11,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:11,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:11,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:11,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:11,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,813 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:11,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:11,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,820 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 04:51:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:11,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730495284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:11,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:11,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551298119] [2021-06-05 04:51:11,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:11,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:11,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:11,826 INFO L87 Difference]: Start difference. First operand 157 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:12,005 INFO L93 Difference]: Finished difference Result 189 states and 397 transitions. [2021-06-05 04:51:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:12,005 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:51:12,005 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:51:12,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:51:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 150. [2021-06-05 04:51:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.161073825503356) internal successors, (322), 149 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 322 transitions. [2021-06-05 04:51:12,007 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 322 transitions. Word has length 19 [2021-06-05 04:51:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:12,007 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 322 transitions. [2021-06-05 04:51:12,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 322 transitions. [2021-06-05 04:51:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:12,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:12,007 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:12,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18401 [2021-06-05 04:51:12,207 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash -818282917, now seen corresponding path program 346 times [2021-06-05 04:51:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:12,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531891555] [2021-06-05 04:51:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:12,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:12,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531891555] [2021-06-05 04:51:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531891555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:12,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109893700] [2021-06-05 04:51:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:12,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:12,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109893700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:12,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:12,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:12,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851277930] [2021-06-05 04:51:12,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:12,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:12,529 INFO L87 Difference]: Start difference. First operand 150 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:12,696 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 04:51:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:12,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:12,696 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:51:12,696 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:51:12,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:51:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 152. [2021-06-05 04:51:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 04:51:12,698 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 04:51:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:12,698 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 04:51:12,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 04:51:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:12,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:12,698 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:12,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18420 [2021-06-05 04:51:12,899 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2091506633, now seen corresponding path program 347 times [2021-06-05 04:51:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:12,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091921865] [2021-06-05 04:51:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:12,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091921865] [2021-06-05 04:51:12,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091921865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367029882] [2021-06-05 04:51:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:13,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:13,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:13,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367029882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:13,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:13,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826716880] [2021-06-05 04:51:13,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:13,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:13,247 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:13,557 INFO L93 Difference]: Finished difference Result 207 states and 436 transitions. [2021-06-05 04:51:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:13,558 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:51:13,558 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:51:13,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:51:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:51:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2021-06-05 04:51:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 04:51:13,559 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 04:51:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:13,559 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 04:51:13,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 04:51:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:13,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:13,560 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:13,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18438,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:13,760 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1076992155, now seen corresponding path program 348 times [2021-06-05 04:51:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:13,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868790545] [2021-06-05 04:51:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:13,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:13,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868790545] [2021-06-05 04:51:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868790545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:13,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752619111] [2021-06-05 04:51:13,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:13,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:51:13,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:13,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:14,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752619111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:14,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:14,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185314844] [2021-06-05 04:51:14,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:14,212 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:14,592 INFO L93 Difference]: Finished difference Result 219 states and 460 transitions. [2021-06-05 04:51:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:14,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:14,593 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:51:14,593 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:51:14,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:51:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:51:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2021-06-05 04:51:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.156862745098039) internal successors, (330), 153 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 330 transitions. [2021-06-05 04:51:14,595 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 330 transitions. Word has length 19 [2021-06-05 04:51:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:14,595 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 330 transitions. [2021-06-05 04:51:14,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 330 transitions. [2021-06-05 04:51:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:14,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:14,595 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:14,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18469 [2021-06-05 04:51:14,795 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 629654432, now seen corresponding path program 349 times [2021-06-05 04:51:14,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:14,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270657077] [2021-06-05 04:51:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:14,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270657077] [2021-06-05 04:51:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270657077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018934823] [2021-06-05 04:51:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:14,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:15,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:15,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:15,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:15,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,267 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:51:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:15,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:15,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:15,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:15,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:15,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:15,420 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:15,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:15,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:15,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:15,469 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:51:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:15,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018934823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:15,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:15,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241274390] [2021-06-05 04:51:15,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:15,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:15,499 INFO L87 Difference]: Start difference. First operand 154 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:15,664 INFO L93 Difference]: Finished difference Result 179 states and 381 transitions. [2021-06-05 04:51:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:15,665 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:51:15,665 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:51:15,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:51:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 04:51:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.16) internal successors, (324), 150 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 324 transitions. [2021-06-05 04:51:15,666 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 324 transitions. Word has length 19 [2021-06-05 04:51:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:15,666 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 324 transitions. [2021-06-05 04:51:15,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 324 transitions. [2021-06-05 04:51:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:15,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:15,666 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:15,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18528 [2021-06-05 04:51:15,867 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1163224865, now seen corresponding path program 350 times [2021-06-05 04:51:15,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:15,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365503974] [2021-06-05 04:51:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:15,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:15,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365503974] [2021-06-05 04:51:15,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365503974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394700641] [2021-06-05 04:51:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:16,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:16,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394700641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:16,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:16,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162527] [2021-06-05 04:51:16,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:16,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:16,205 INFO L87 Difference]: Start difference. First operand 151 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:16,423 INFO L93 Difference]: Finished difference Result 189 states and 400 transitions. [2021-06-05 04:51:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:16,424 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:51:16,424 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:51:16,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:51:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2021-06-05 04:51:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 04:51:16,426 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 04:51:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:16,426 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 04:51:16,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 04:51:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:16,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:16,426 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:16,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18551 [2021-06-05 04:51:16,626 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -479018955, now seen corresponding path program 351 times [2021-06-05 04:51:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:16,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373113170] [2021-06-05 04:51:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:16,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373113170] [2021-06-05 04:51:16,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373113170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702608737] [2021-06-05 04:51:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:16,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:16,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:17,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702608737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:17,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:17,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608681273] [2021-06-05 04:51:17,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:17,009 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:17,275 INFO L93 Difference]: Finished difference Result 215 states and 453 transitions. [2021-06-05 04:51:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:17,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:17,276 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:51:17,276 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:51:17,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:51:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2021-06-05 04:51:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.156862745098039) internal successors, (330), 153 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 330 transitions. [2021-06-05 04:51:17,277 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 330 transitions. Word has length 19 [2021-06-05 04:51:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:17,278 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 330 transitions. [2021-06-05 04:51:17,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 330 transitions. [2021-06-05 04:51:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:17,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:17,278 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:17,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:17,478 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1669890230, now seen corresponding path program 352 times [2021-06-05 04:51:17,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:17,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133202089] [2021-06-05 04:51:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:17,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:17,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133202089] [2021-06-05 04:51:17,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133202089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:17,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515642056] [2021-06-05 04:51:17,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:17,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:17,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:17,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:17,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:17,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:17,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:17,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,881 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 04:51:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:17,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:17,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:17,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:17,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:17,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:17,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:17,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:17,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:17,967 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:51:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:17,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515642056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:17,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:17,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:17,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884772498] [2021-06-05 04:51:17,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:17,995 INFO L87 Difference]: Start difference. First operand 154 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:18,182 INFO L93 Difference]: Finished difference Result 177 states and 377 transitions. [2021-06-05 04:51:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:18,182 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:51:18,182 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:51:18,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:51:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 152. [2021-06-05 04:51:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 04:51:18,184 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 04:51:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:18,184 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 04:51:18,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 04:51:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:18,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:18,184 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:18,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18624,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:18,385 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1589994021, now seen corresponding path program 353 times [2021-06-05 04:51:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:18,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109543164] [2021-06-05 04:51:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:18,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109543164] [2021-06-05 04:51:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109543164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137761857] [2021-06-05 04:51:18,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:18,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:51:18,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:18,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137761857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:18,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:18,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838717432] [2021-06-05 04:51:18,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:18,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:18,765 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:18,977 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-06-05 04:51:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:18,977 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:51:18,977 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:51:18,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:51:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-06-05 04:51:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1633986928104574) internal successors, (331), 153 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 331 transitions. [2021-06-05 04:51:18,979 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 331 transitions. Word has length 19 [2021-06-05 04:51:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:18,979 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 331 transitions. [2021-06-05 04:51:18,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 331 transitions. [2021-06-05 04:51:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:18,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:18,979 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:19,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:19,180 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2037331744, now seen corresponding path program 354 times [2021-06-05 04:51:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:19,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448517005] [2021-06-05 04:51:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:19,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448517005] [2021-06-05 04:51:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448517005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195742661] [2021-06-05 04:51:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:19,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:51:19,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:19,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:19,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:19,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:19,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:19,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:19,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:19,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:19,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:19,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:19,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:19,566 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,598 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:19,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:19,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:19,624 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:19,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:19,625 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195742661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857870926] [2021-06-05 04:51:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:19,647 INFO L87 Difference]: Start difference. First operand 154 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:19,919 INFO L93 Difference]: Finished difference Result 229 states and 468 transitions. [2021-06-05 04:51:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:19,919 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:51:19,920 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:51:19,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:51:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 155. [2021-06-05 04:51:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1818181818181817) internal successors, (336), 154 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 336 transitions. [2021-06-05 04:51:19,921 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 336 transitions. Word has length 19 [2021-06-05 04:51:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:19,921 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 336 transitions. [2021-06-05 04:51:19,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 336 transitions. [2021-06-05 04:51:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:19,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:19,922 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:20,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18680 [2021-06-05 04:51:20,122 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1722405750, now seen corresponding path program 355 times [2021-06-05 04:51:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:20,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213608046] [2021-06-05 04:51:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:20,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213608046] [2021-06-05 04:51:20,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213608046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642527763] [2021-06-05 04:51:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:20,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:20,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:20,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:20,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:20,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,497 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:20,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:20,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:20,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,504 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642527763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:20,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:20,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:20,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12189788] [2021-06-05 04:51:20,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:20,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:20,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:20,510 INFO L87 Difference]: Start difference. First operand 155 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:20,701 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 04:51:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:20,701 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:51:20,701 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:51:20,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:51:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2021-06-05 04:51:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.164473684210526) internal successors, (329), 152 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 329 transitions. [2021-06-05 04:51:20,703 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 329 transitions. Word has length 19 [2021-06-05 04:51:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:20,703 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 329 transitions. [2021-06-05 04:51:20,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 329 transitions. [2021-06-05 04:51:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:20,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:20,703 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:20,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18734,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:20,904 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:20,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1357685215, now seen corresponding path program 356 times [2021-06-05 04:51:20,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:20,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715400685] [2021-06-05 04:51:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:20,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:20,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715400685] [2021-06-05 04:51:20,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715400685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:20,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602948651] [2021-06-05 04:51:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:21,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:21,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602948651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:21,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:21,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635415001] [2021-06-05 04:51:21,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:21,244 INFO L87 Difference]: Start difference. First operand 153 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:21,408 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 04:51:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:21,409 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:51:21,409 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:51:21,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:51:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 04:51:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 04:51:21,410 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 04:51:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:21,410 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 04:51:21,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 04:51:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:21,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:21,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:21,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18775 [2021-06-05 04:51:21,611 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash -41464289, now seen corresponding path program 357 times [2021-06-05 04:51:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:21,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542716110] [2021-06-05 04:51:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:21,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542716110] [2021-06-05 04:51:21,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542716110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172091472] [2021-06-05 04:51:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:21,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:51:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172091472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:21,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:21,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359878601] [2021-06-05 04:51:21,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:21,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:21,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:21,938 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:22,104 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 04:51:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:22,104 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:51:22,104 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:51:22,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:51:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 152. [2021-06-05 04:51:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 04:51:22,106 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 04:51:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:22,106 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 04:51:22,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 04:51:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:22,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:22,106 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:22,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18801,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:22,307 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash 642741621, now seen corresponding path program 358 times [2021-06-05 04:51:22,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:22,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434228856] [2021-06-05 04:51:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:22,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434228856] [2021-06-05 04:51:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434228856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576723510] [2021-06-05 04:51:22,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:22,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576723510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:22,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:22,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257184274] [2021-06-05 04:51:22,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:22,700 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:22,831 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-05 04:51:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:22,832 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:51:22,832 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:51:22,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:51:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 153. [2021-06-05 04:51:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 04:51:22,833 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 04:51:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:22,834 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 04:51:22,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 04:51:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:22,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:22,834 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:23,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18820 [2021-06-05 04:51:23,034 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1503316490, now seen corresponding path program 359 times [2021-06-05 04:51:23,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:23,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259940840] [2021-06-05 04:51:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:23,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259940840] [2021-06-05 04:51:23,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259940840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792486351] [2021-06-05 04:51:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:23,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:23,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:23,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:23,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:23,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,427 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 04:51:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:23,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:23,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:23,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:23,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:23,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:23,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:23,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:23,514 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:51:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:23,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792486351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:23,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:23,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:23,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816697041] [2021-06-05 04:51:23,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:23,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:23,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:23,543 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:23,705 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2021-06-05 04:51:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:23,706 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:51:23,706 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:51:23,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:51:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2021-06-05 04:51:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.16) internal successors, (324), 150 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 324 transitions. [2021-06-05 04:51:23,707 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 324 transitions. Word has length 19 [2021-06-05 04:51:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:23,707 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 324 transitions. [2021-06-05 04:51:23,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 324 transitions. [2021-06-05 04:51:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:23,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:23,707 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:23,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18864,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:23,908 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash -468233445, now seen corresponding path program 360 times [2021-06-05 04:51:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:23,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363550791] [2021-06-05 04:51:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:23,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363550791] [2021-06-05 04:51:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363550791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433722376] [2021-06-05 04:51:23,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:24,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:24,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:24,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433722376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:24,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:24,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:24,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246785045] [2021-06-05 04:51:24,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:24,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:24,278 INFO L87 Difference]: Start difference. First operand 151 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:24,478 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-06-05 04:51:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:24,479 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:51:24,479 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:51:24,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:51:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2021-06-05 04:51:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.164473684210526) internal successors, (329), 152 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 329 transitions. [2021-06-05 04:51:24,481 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 329 transitions. Word has length 19 [2021-06-05 04:51:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:24,481 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 329 transitions. [2021-06-05 04:51:24,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 329 transitions. [2021-06-05 04:51:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:24,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:24,481 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:24,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18884 [2021-06-05 04:51:24,682 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash -915571168, now seen corresponding path program 361 times [2021-06-05 04:51:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391888566] [2021-06-05 04:51:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:24,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391888566] [2021-06-05 04:51:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391888566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622643595] [2021-06-05 04:51:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:25,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:25,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:25,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:25,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:25,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:25,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:25,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:25,127 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:25,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:25,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:25,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,183 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:25,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:25,208 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:25,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:25,208 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:25,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622643595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:25,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:25,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:25,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261303217] [2021-06-05 04:51:25,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:25,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:25,237 INFO L87 Difference]: Start difference. First operand 153 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:25,566 INFO L93 Difference]: Finished difference Result 233 states and 470 transitions. [2021-06-05 04:51:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:25,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:25,566 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:51:25,566 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:51:25,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:51:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 154. [2021-06-05 04:51:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.183006535947712) internal successors, (334), 153 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 334 transitions. [2021-06-05 04:51:25,568 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 334 transitions. Word has length 19 [2021-06-05 04:51:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:25,568 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 334 transitions. [2021-06-05 04:51:25,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 334 transitions. [2021-06-05 04:51:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:25,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:25,569 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18917,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:25,769 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1450800970, now seen corresponding path program 362 times [2021-06-05 04:51:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374251658] [2021-06-05 04:51:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:25,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374251658] [2021-06-05 04:51:25,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374251658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514556981] [2021-06-05 04:51:25,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:25,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:25,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:26,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:26,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:26,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,098 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:26,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:26,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 04:51:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:26,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514556981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:26,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:26,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:26,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21710207] [2021-06-05 04:51:26,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:26,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:26,111 INFO L87 Difference]: Start difference. First operand 154 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:26,311 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-06-05 04:51:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:26,312 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:51:26,312 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:51:26,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:51:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2021-06-05 04:51:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 04:51:26,314 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 04:51:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:26,314 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 04:51:26,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 04:51:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:26,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:26,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:26,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19008 [2021-06-05 04:51:26,515 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1815521505, now seen corresponding path program 363 times [2021-06-05 04:51:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:26,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991640809] [2021-06-05 04:51:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:26,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:26,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991640809] [2021-06-05 04:51:26,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991640809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:26,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142434987] [2021-06-05 04:51:26,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:26,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:26,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:26,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142434987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:26,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:26,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:26,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208390778] [2021-06-05 04:51:26,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:26,928 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:27,098 INFO L93 Difference]: Finished difference Result 168 states and 355 transitions. [2021-06-05 04:51:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:27,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:27,098 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:51:27,098 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 04:51:27,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 04:51:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2021-06-05 04:51:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.161073825503356) internal successors, (322), 149 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 322 transitions. [2021-06-05 04:51:27,100 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 322 transitions. Word has length 19 [2021-06-05 04:51:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:27,100 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 322 transitions. [2021-06-05 04:51:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 322 transitions. [2021-06-05 04:51:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:27,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:27,100 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:27,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19028 [2021-06-05 04:51:27,301 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2024244555, now seen corresponding path program 364 times [2021-06-05 04:51:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28786041] [2021-06-05 04:51:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:27,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28786041] [2021-06-05 04:51:27,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28786041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147436759] [2021-06-05 04:51:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:27,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:27,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:27,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147436759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:27,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:27,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:27,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851377961] [2021-06-05 04:51:27,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:27,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:27,657 INFO L87 Difference]: Start difference. First operand 150 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:27,916 INFO L93 Difference]: Finished difference Result 196 states and 408 transitions. [2021-06-05 04:51:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:27,917 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:51:27,917 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:51:27,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:51:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2021-06-05 04:51:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1710526315789473) internal successors, (330), 152 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 330 transitions. [2021-06-05 04:51:27,919 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 330 transitions. Word has length 19 [2021-06-05 04:51:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:27,919 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 330 transitions. [2021-06-05 04:51:27,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 330 transitions. [2021-06-05 04:51:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:27,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:27,919 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:28,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19055,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:28,119 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash 124664630, now seen corresponding path program 365 times [2021-06-05 04:51:28,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:28,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129201917] [2021-06-05 04:51:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:28,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:28,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129201917] [2021-06-05 04:51:28,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129201917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:28,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622178732] [2021-06-05 04:51:28,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:28,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:28,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:28,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:28,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:28,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:28,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:28,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:28,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:28,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:28,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:28,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:28,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:28,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:28,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,538 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:51:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:28,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:28,563 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:28,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:28,564 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622178732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808486078] [2021-06-05 04:51:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:28,586 INFO L87 Difference]: Start difference. First operand 153 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:29,114 INFO L93 Difference]: Finished difference Result 245 states and 493 transitions. [2021-06-05 04:51:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:51:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:29,115 INFO L225 Difference]: With dead ends: 245 [2021-06-05 04:51:29,115 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 04:51:29,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:51:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 04:51:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2021-06-05 04:51:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-06-05 04:51:29,116 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-06-05 04:51:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:29,116 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-06-05 04:51:29,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-06-05 04:51:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:29,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:29,117 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:29,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19089 [2021-06-05 04:51:29,317 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash -410565172, now seen corresponding path program 366 times [2021-06-05 04:51:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:29,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866811308] [2021-06-05 04:51:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:29,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:29,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866811308] [2021-06-05 04:51:29,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866811308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:29,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754025047] [2021-06-05 04:51:29,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:29,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:29,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:29,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:29,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:29,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:29,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:29,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:29,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:29,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:29,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,683 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:29,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:29,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,690 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:29,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754025047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:29,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:29,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:29,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338896990] [2021-06-05 04:51:29,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:29,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:29,696 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:30,008 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 04:51:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:30,009 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:51:30,009 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:51:30,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:51:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2021-06-05 04:51:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-06-05 04:51:30,011 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-06-05 04:51:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:30,011 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-06-05 04:51:30,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-06-05 04:51:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:30,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:30,011 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:30,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19139 [2021-06-05 04:51:30,225 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -775285707, now seen corresponding path program 367 times [2021-06-05 04:51:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179717857] [2021-06-05 04:51:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179717857] [2021-06-05 04:51:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179717857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241022787] [2021-06-05 04:51:30,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:30,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241022787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:30,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:30,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:30,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644841237] [2021-06-05 04:51:30,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:30,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:30,561 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:30,816 INFO L93 Difference]: Finished difference Result 177 states and 377 transitions. [2021-06-05 04:51:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:30,816 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:51:30,816 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:51:30,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:51:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-06-05 04:51:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.183006535947712) internal successors, (334), 153 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 334 transitions. [2021-06-05 04:51:30,818 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 334 transitions. Word has length 19 [2021-06-05 04:51:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:30,818 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 334 transitions. [2021-06-05 04:51:30,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 334 transitions. [2021-06-05 04:51:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:30,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:30,818 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:31,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19175 [2021-06-05 04:51:31,018 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash 177180150, now seen corresponding path program 368 times [2021-06-05 04:51:31,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:31,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063704615] [2021-06-05 04:51:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:31,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:31,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063704615] [2021-06-05 04:51:31,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063704615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:31,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604839688] [2021-06-05 04:51:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:31,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:31,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:31,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:31,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:31,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:31,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:31,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:31,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,382 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:31,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:31,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:31,389 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604839688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:31,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:31,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:31,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336120304] [2021-06-05 04:51:31,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:31,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:31,396 INFO L87 Difference]: Start difference. First operand 154 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:31,615 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 04:51:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:31,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:31,615 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:51:31,615 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:51:31,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:51:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2021-06-05 04:51:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 04:51:31,618 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 04:51:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:31,618 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 04:51:31,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 04:51:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:31,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:31,618 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:31,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19193,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:31,841 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1540426277, now seen corresponding path program 369 times [2021-06-05 04:51:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368760385] [2021-06-05 04:51:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:31,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:31,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368760385] [2021-06-05 04:51:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368760385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:31,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450325813] [2021-06-05 04:51:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:32,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450325813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:32,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:32,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520256705] [2021-06-05 04:51:32,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:32,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:32,239 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:32,515 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-06-05 04:51:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:32,516 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:51:32,516 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:51:32,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:51:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 149. [2021-06-05 04:51:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 04:51:32,517 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 04:51:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:32,518 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 04:51:32,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 04:51:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:32,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:32,518 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:32,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19229,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:32,718 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1771973494, now seen corresponding path program 370 times [2021-06-05 04:51:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:32,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145879940] [2021-06-05 04:51:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:32,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:32,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145879940] [2021-06-05 04:51:32,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145879940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:32,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136140811] [2021-06-05 04:51:32,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:32,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:33,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:33,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:33,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:33,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:33,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:33,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:33,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,113 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:33,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:33,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:33,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:33,120 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:33,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136140811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:33,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:33,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:33,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896215001] [2021-06-05 04:51:33,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:33,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:33,127 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:33,509 INFO L93 Difference]: Finished difference Result 191 states and 401 transitions. [2021-06-05 04:51:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:33,510 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:51:33,510 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:51:33,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:51:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2021-06-05 04:51:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 04:51:33,512 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 19 [2021-06-05 04:51:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:33,512 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 04:51:33,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 04:51:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:33,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:33,512 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:33,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19265 [2021-06-05 04:51:33,713 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1407252959, now seen corresponding path program 371 times [2021-06-05 04:51:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:33,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757197675] [2021-06-05 04:51:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:33,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:33,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757197675] [2021-06-05 04:51:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757197675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:33,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129094339] [2021-06-05 04:51:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:33,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:34,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129094339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:34,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:34,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:34,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537979635] [2021-06-05 04:51:34,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:34,101 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:34,409 INFO L93 Difference]: Finished difference Result 186 states and 389 transitions. [2021-06-05 04:51:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:34,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:34,409 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:51:34,409 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:51:34,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:51:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-06-05 04:51:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 04:51:34,411 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 04:51:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:34,411 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 04:51:34,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 04:51:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:34,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:34,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:34,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19304 [2021-06-05 04:51:34,612 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1935248480, now seen corresponding path program 372 times [2021-06-05 04:51:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:34,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340775232] [2021-06-05 04:51:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:34,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340775232] [2021-06-05 04:51:34,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340775232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275084404] [2021-06-05 04:51:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:34,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:34,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:34,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:34,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:34,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:34,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,955 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:34,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:34,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 04:51:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275084404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:34,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:34,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:34,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035127249] [2021-06-05 04:51:34,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:34,969 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:35,178 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 04:51:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:35,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:35,179 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:51:35,179 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:51:35,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:51:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 152. [2021-06-05 04:51:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 04:51:35,181 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 04:51:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:35,181 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 04:51:35,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 04:51:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:35,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:35,181 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:35,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19331 [2021-06-05 04:51:35,381 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash -895012682, now seen corresponding path program 373 times [2021-06-05 04:51:35,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:35,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475975101] [2021-06-05 04:51:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475975101] [2021-06-05 04:51:35,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475975101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:35,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34997512] [2021-06-05 04:51:35,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:35,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:35,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:35,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:35,736 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:35,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:35,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:35,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:35,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:35,744 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:51:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34997512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:35,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:35,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:35,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588344083] [2021-06-05 04:51:35,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:35,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:35,750 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:35,927 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-06-05 04:51:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:35,928 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:51:35,928 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:51:35,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:51:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 150. [2021-06-05 04:51:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1543624161073827) internal successors, (321), 149 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 321 transitions. [2021-06-05 04:51:35,929 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 321 transitions. Word has length 19 [2021-06-05 04:51:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:35,929 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 321 transitions. [2021-06-05 04:51:35,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 321 transitions. [2021-06-05 04:51:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:35,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:35,930 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:36,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19351 [2021-06-05 04:51:36,130 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash -934136993, now seen corresponding path program 374 times [2021-06-05 04:51:36,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:36,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064459790] [2021-06-05 04:51:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:36,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064459790] [2021-06-05 04:51:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064459790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115415713] [2021-06-05 04:51:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:36,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:36,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:36,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115415713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:36,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:36,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220046431] [2021-06-05 04:51:36,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:36,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:36,493 INFO L87 Difference]: Start difference. First operand 150 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:36,657 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-06-05 04:51:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:36,658 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:51:36,658 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:51:36,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:51:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-06-05 04:51:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 04:51:36,659 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 04:51:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:36,659 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 04:51:36,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 04:51:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:36,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:36,660 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:36,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19373,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:36,860 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash -835352655, now seen corresponding path program 375 times [2021-06-05 04:51:36,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:36,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883811383] [2021-06-05 04:51:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:36,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883811383] [2021-06-05 04:51:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883811383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641787575] [2021-06-05 04:51:36,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:37,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:37,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:37,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:37,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:37,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:37,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:37,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,254 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:37,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:37,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:37,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:37,261 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641787575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:37,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:37,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065979013] [2021-06-05 04:51:37,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:37,266 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:37,464 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2021-06-05 04:51:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:37,465 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:51:37,465 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:51:37,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:51:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-06-05 04:51:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 04:51:37,467 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 04:51:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:37,467 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 04:51:37,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 04:51:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:37,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:37,467 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:37,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19400 [2021-06-05 04:51:37,667 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -826189821, now seen corresponding path program 376 times [2021-06-05 04:51:37,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:37,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49934056] [2021-06-05 04:51:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:37,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:37,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49934056] [2021-06-05 04:51:37,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49934056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:37,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554816285] [2021-06-05 04:51:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:37,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:37,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:38,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:38,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,034 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:38,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:38,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:38,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:51:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:38,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554816285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:38,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:38,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958330397] [2021-06-05 04:51:38,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:38,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:38,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:38,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:38,046 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:38,292 INFO L93 Difference]: Finished difference Result 188 states and 396 transitions. [2021-06-05 04:51:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:38,293 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:51:38,293 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:51:38,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:51:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2021-06-05 04:51:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 04:51:38,294 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 04:51:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:38,294 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 04:51:38,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 04:51:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:38,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:38,295 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:38,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19441 [2021-06-05 04:51:38,495 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2083599729, now seen corresponding path program 377 times [2021-06-05 04:51:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:38,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642126618] [2021-06-05 04:51:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:38,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:38,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642126618] [2021-06-05 04:51:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642126618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752966457] [2021-06-05 04:51:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:38,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:38,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:38,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:38,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:38,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:38,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,874 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:38,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:38,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:38,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,880 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752966457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:38,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:38,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326148816] [2021-06-05 04:51:38,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:38,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:38,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:38,886 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:39,279 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2021-06-05 04:51:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:39,280 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:51:39,280 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:51:39,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:51:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2021-06-05 04:51:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 324 transitions. [2021-06-05 04:51:39,281 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 324 transitions. Word has length 19 [2021-06-05 04:51:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:39,281 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 324 transitions. [2021-06-05 04:51:39,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 324 transitions. [2021-06-05 04:51:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:39,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:39,282 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:39,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19466 [2021-06-05 04:51:39,489 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1069085251, now seen corresponding path program 378 times [2021-06-05 04:51:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:39,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538588722] [2021-06-05 04:51:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:39,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538588722] [2021-06-05 04:51:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538588722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002238586] [2021-06-05 04:51:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:39,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:39,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:39,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:39,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:39,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:39,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:39,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:39,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:39,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:39,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:39,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:39,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:39,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:39,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:39,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,935 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:39,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:39,959 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:39,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:39,960 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:39,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002238586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:39,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:39,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:39,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925799218] [2021-06-05 04:51:39,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:39,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:39,984 INFO L87 Difference]: Start difference. First operand 152 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:40,371 INFO L93 Difference]: Finished difference Result 201 states and 422 transitions. [2021-06-05 04:51:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:40,372 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:51:40,372 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:51:40,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:51:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2021-06-05 04:51:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1447368421052633) internal successors, (326), 152 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 326 transitions. [2021-06-05 04:51:40,374 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 326 transitions. Word has length 19 [2021-06-05 04:51:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:40,375 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 326 transitions. [2021-06-05 04:51:40,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 326 transitions. [2021-06-05 04:51:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:40,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:40,375 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19502 [2021-06-05 04:51:40,577 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 621747528, now seen corresponding path program 379 times [2021-06-05 04:51:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:40,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286273569] [2021-06-05 04:51:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:40,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:40,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286273569] [2021-06-05 04:51:40,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286273569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:40,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483898498] [2021-06-05 04:51:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:41,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483898498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:41,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:41,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:41,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701123007] [2021-06-05 04:51:41,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:41,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:41,038 INFO L87 Difference]: Start difference. First operand 153 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:41,188 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-06-05 04:51:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:41,189 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:51:41,189 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 04:51:41,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 04:51:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-06-05 04:51:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 04:51:41,190 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 04:51:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:41,191 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 04:51:41,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 04:51:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:41,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:41,191 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19555 [2021-06-05 04:51:41,391 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1356348845, now seen corresponding path program 380 times [2021-06-05 04:51:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930967987] [2021-06-05 04:51:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:41,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930967987] [2021-06-05 04:51:41,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930967987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74995831] [2021-06-05 04:51:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:41,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:41,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:41,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:41,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:41,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,733 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:41,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:41,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,740 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:51:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:41,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74995831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:41,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:41,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:41,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581973547] [2021-06-05 04:51:41,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:41,745 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:41,942 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2021-06-05 04:51:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:41,943 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:51:41,943 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:51:41,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:51:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2021-06-05 04:51:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 04:51:41,949 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 04:51:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 04:51:41,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 04:51:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:41,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:41,949 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:42,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19612 [2021-06-05 04:51:42,150 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -28828901, now seen corresponding path program 381 times [2021-06-05 04:51:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:42,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747072873] [2021-06-05 04:51:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747072873] [2021-06-05 04:51:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747072873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049817233] [2021-06-05 04:51:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:42,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:42,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:42,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:42,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:42,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:42,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:42,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:42,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:42,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,521 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:42,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:42,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,528 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049817233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:42,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:42,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933502184] [2021-06-05 04:51:42,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:42,533 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:42,862 INFO L93 Difference]: Finished difference Result 192 states and 404 transitions. [2021-06-05 04:51:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:42,863 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:51:42,863 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:51:42,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:51:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2021-06-05 04:51:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 04:51:42,864 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 04:51:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:42,864 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 04:51:42,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 04:51:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:42,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:42,865 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:43,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19637,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:43,065 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 655377009, now seen corresponding path program 382 times [2021-06-05 04:51:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:43,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110778911] [2021-06-05 04:51:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:43,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110778911] [2021-06-05 04:51:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110778911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714670263] [2021-06-05 04:51:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:43,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:43,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:43,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:43,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:43,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:43,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:43,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:43,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:43,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:43,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:43,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:43,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:43,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,569 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:51:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:43,572 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:43,594 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:43,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:43,595 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714670263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:43,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:43,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:43,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690607069] [2021-06-05 04:51:43,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:43,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:43,617 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:43,962 INFO L93 Difference]: Finished difference Result 202 states and 425 transitions. [2021-06-05 04:51:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:43,962 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:51:43,962 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:51:43,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:51:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2021-06-05 04:51:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 04:51:43,964 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 04:51:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:43,964 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 04:51:43,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 04:51:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:43,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:43,964 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:44,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19674 [2021-06-05 04:51:44,165 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1490681102, now seen corresponding path program 383 times [2021-06-05 04:51:44,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:44,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34914111] [2021-06-05 04:51:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:44,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:44,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34914111] [2021-06-05 04:51:44,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34914111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:44,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342031359] [2021-06-05 04:51:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:44,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:44,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342031359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:44,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:44,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48153609] [2021-06-05 04:51:44,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:44,570 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:44,753 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2021-06-05 04:51:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:44,753 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:51:44,753 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:51:44,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:51:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-06-05 04:51:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 04:51:44,755 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 04:51:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:44,755 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 04:51:44,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 04:51:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:44,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:44,755 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:44,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19761,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:44,956 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406897, now seen corresponding path program 384 times [2021-06-05 04:51:44,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:44,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045688604] [2021-06-05 04:51:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:45,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:45,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045688604] [2021-06-05 04:51:45,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045688604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705295526] [2021-06-05 04:51:45,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:45,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:45,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:45,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:45,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:45,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:45,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:45,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,340 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:45,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:45,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:45,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,347 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705295526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:45,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:45,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302082031] [2021-06-05 04:51:45,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:45,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:45,352 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:45,560 INFO L93 Difference]: Finished difference Result 178 states and 376 transitions. [2021-06-05 04:51:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:45,560 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:51:45,560 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:51:45,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:51:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2021-06-05 04:51:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 04:51:45,562 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 04:51:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:45,562 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 04:51:45,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 04:51:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:45,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:45,562 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:45,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19808,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:45,777 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1695612807, now seen corresponding path program 385 times [2021-06-05 04:51:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:45,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824361966] [2021-06-05 04:51:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:45,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824361966] [2021-06-05 04:51:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824361966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591347020] [2021-06-05 04:51:45,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:46,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:46,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:46,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:46,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:46,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:46,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:46,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:46,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:46,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:46,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:46,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,261 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:46,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:46,263 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,286 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:46,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:46,286 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:46,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591347020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:46,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:46,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629178831] [2021-06-05 04:51:46,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:46,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:46,309 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:46,529 INFO L93 Difference]: Finished difference Result 194 states and 409 transitions. [2021-06-05 04:51:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:46,529 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:51:46,529 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:51:46,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:51:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2021-06-05 04:51:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 04:51:46,531 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 04:51:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:46,531 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 04:51:46,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 04:51:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:46,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:46,531 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:46,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19850 [2021-06-05 04:51:46,732 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash -450445304, now seen corresponding path program 386 times [2021-06-05 04:51:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703273249] [2021-06-05 04:51:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:46,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703273249] [2021-06-05 04:51:46,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703273249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947222832] [2021-06-05 04:51:46,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:46,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:46,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947222832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:47,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:47,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:47,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291047127] [2021-06-05 04:51:47,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:47,112 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:47,259 INFO L93 Difference]: Finished difference Result 165 states and 351 transitions. [2021-06-05 04:51:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:47,260 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:51:47,260 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:51:47,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:51:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 04:51:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 04:51:47,261 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 04:51:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:47,261 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 04:51:47,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 04:51:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:47,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:47,262 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:47,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19935,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:47,462 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2011609167, now seen corresponding path program 387 times [2021-06-05 04:51:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740604646] [2021-06-05 04:51:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:47,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:47,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740604646] [2021-06-05 04:51:47,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740604646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:47,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227808259] [2021-06-05 04:51:47,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:47,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:47,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:47,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:47,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:47,902 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 04:51:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:47,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:47,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:47,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:47,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:47,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:47,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:47,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:48,000 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:48,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:48,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:48,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:48,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:48,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:48,082 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:48,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:48,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:48,105 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:51:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:48,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227808259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:48,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:48,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:48,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5952559] [2021-06-05 04:51:48,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:48,133 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:48,299 INFO L93 Difference]: Finished difference Result 184 states and 382 transitions. [2021-06-05 04:51:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:48,300 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:51:48,300 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:51:48,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:51:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-06-05 04:51:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1533333333333333) internal successors, (323), 150 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 323 transitions. [2021-06-05 04:51:48,301 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 323 transitions. Word has length 19 [2021-06-05 04:51:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:48,301 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 323 transitions. [2021-06-05 04:51:48,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 323 transitions. [2021-06-05 04:51:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:48,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:48,301 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:48,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19982 [2021-06-05 04:51:48,502 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash 137300018, now seen corresponding path program 388 times [2021-06-05 04:51:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:48,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343180583] [2021-06-05 04:51:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:48,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:48,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343180583] [2021-06-05 04:51:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343180583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:48,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280483885] [2021-06-05 04:51:48,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:48,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280483885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:48,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:48,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347990592] [2021-06-05 04:51:48,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:48,856 INFO L87 Difference]: Start difference. First operand 151 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:49,020 INFO L93 Difference]: Finished difference Result 223 states and 459 transitions. [2021-06-05 04:51:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:49,021 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:51:49,021 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:51:49,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:51:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2021-06-05 04:51:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.172185430463576) internal successors, (328), 151 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 328 transitions. [2021-06-05 04:51:49,022 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 328 transitions. Word has length 19 [2021-06-05 04:51:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:49,022 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 328 transitions. [2021-06-05 04:51:49,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 328 transitions. [2021-06-05 04:51:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:49,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:49,023 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:49,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20004 [2021-06-05 04:51:49,223 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -397929784, now seen corresponding path program 389 times [2021-06-05 04:51:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:49,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541611280] [2021-06-05 04:51:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:49,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541611280] [2021-06-05 04:51:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541611280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811805481] [2021-06-05 04:51:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:49,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:51:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:49,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811805481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:49,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76139351] [2021-06-05 04:51:49,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:49,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:49,546 INFO L87 Difference]: Start difference. First operand 152 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:49,707 INFO L93 Difference]: Finished difference Result 183 states and 389 transitions. [2021-06-05 04:51:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:51:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:49,707 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:51:49,707 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:51:49,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:51:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2021-06-05 04:51:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1543624161073827) internal successors, (321), 149 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 321 transitions. [2021-06-05 04:51:49,709 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 321 transitions. Word has length 19 [2021-06-05 04:51:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:49,709 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 321 transitions. [2021-06-05 04:51:49,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 321 transitions. [2021-06-05 04:51:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:49,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:49,709 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:49,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20033 [2021-06-05 04:51:49,910 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:49,910 INFO L82 PathProgramCache]: Analyzing trace with hash -762650319, now seen corresponding path program 390 times [2021-06-05 04:51:49,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:49,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811944566] [2021-06-05 04:51:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811944566] [2021-06-05 04:51:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811944566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246883606] [2021-06-05 04:51:49,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:50,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:51:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:50,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:50,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246883606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:50,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:50,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:50,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702316741] [2021-06-05 04:51:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:50,302 INFO L87 Difference]: Start difference. First operand 150 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:50,519 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 04:51:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:50,520 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:51:50,520 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:51:50,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:51:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-06-05 04:51:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 04:51:50,521 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 04:51:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:50,521 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 04:51:50,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 04:51:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:50,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:50,522 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:50,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20049 [2021-06-05 04:51:50,722 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash 295570755, now seen corresponding path program 391 times [2021-06-05 04:51:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:50,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458727991] [2021-06-05 04:51:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:50,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:50,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458727991] [2021-06-05 04:51:50,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458727991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:50,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412833861] [2021-06-05 04:51:50,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:51,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:51,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:51,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:51,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,072 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:51:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:51,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,095 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:51:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:51,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412833861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:51,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127965896] [2021-06-05 04:51:51,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:51,101 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:51,326 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 04:51:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:51,326 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:51:51,326 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:51:51,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:51:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2021-06-05 04:51:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 04:51:51,328 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 04:51:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:51,328 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 04:51:51,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 04:51:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:51,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:51,328 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:51,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20075,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:51,529 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1089606991, now seen corresponding path program 392 times [2021-06-05 04:51:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:51,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894215791] [2021-06-05 04:51:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:51,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894215791] [2021-06-05 04:51:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894215791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544823521] [2021-06-05 04:51:51,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:51,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:51,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:51,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:51,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,879 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:51,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,886 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:51:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:51,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544823521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:51,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:51,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488252483] [2021-06-05 04:51:51,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:51,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:51,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:51,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:51,891 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:52,177 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 04:51:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:52,178 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:51:52,178 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:51:52,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:51:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:51:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-06-05 04:51:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 04:51:52,180 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 04:51:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:52,180 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 04:51:52,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 04:51:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:52,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:52,180 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:52,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20105,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:52,381 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2104121469, now seen corresponding path program 393 times [2021-06-05 04:51:52,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066122719] [2021-06-05 04:51:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:52,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:52,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066122719] [2021-06-05 04:51:52,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066122719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:52,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897772789] [2021-06-05 04:51:52,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:52,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:52,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:52,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:52,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:52,818 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,849 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:51:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,874 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:52,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:52,875 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:51:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897772789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:52,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:52,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:52,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044505605] [2021-06-05 04:51:52,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:52,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:52,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:52,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:52,898 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:53,254 INFO L93 Difference]: Finished difference Result 202 states and 424 transitions. [2021-06-05 04:51:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:53,255 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:51:53,255 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:51:53,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:51:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 04:51:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 04:51:53,257 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 04:51:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 04:51:53,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 04:51:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:53,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:53,258 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:53,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20128,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:53,461 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1743508104, now seen corresponding path program 394 times [2021-06-05 04:51:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:53,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552963602] [2021-06-05 04:51:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:53,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:53,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552963602] [2021-06-05 04:51:53,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552963602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830980099] [2021-06-05 04:51:53,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:53,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:53,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830980099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:53,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:53,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201064694] [2021-06-05 04:51:53,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:53,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:53,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:53,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:53,812 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:53,983 INFO L93 Difference]: Finished difference Result 167 states and 355 transitions. [2021-06-05 04:51:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:53,983 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:51:53,984 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:51:53,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:51:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2021-06-05 04:51:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 04:51:53,985 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 04:51:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:53,985 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 04:51:53,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 04:51:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:53,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:53,985 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:54,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20209,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:54,186 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash -49371193, now seen corresponding path program 395 times [2021-06-05 04:51:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117975512] [2021-06-05 04:51:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:54,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:54,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117975512] [2021-06-05 04:51:54,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117975512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461966924] [2021-06-05 04:51:54,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:54,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:54,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:54,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:54,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:54,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:54,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:54,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:54,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,534 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:51:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:54,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:54,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 04:51:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:54,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461966924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:54,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825981963] [2021-06-05 04:51:54,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:54,546 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:54,728 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2021-06-05 04:51:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:54,728 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:51:54,728 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:51:54,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:51:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2021-06-05 04:51:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 04:51:54,730 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 04:51:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:54,730 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 04:51:54,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 04:51:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:54,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:54,730 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:54,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20244,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:54,931 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1063885671, now seen corresponding path program 396 times [2021-06-05 04:51:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:54,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064774488] [2021-06-05 04:51:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:55,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:55,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064774488] [2021-06-05 04:51:55,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064774488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973516594] [2021-06-05 04:51:55,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:55,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:55,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:55,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:55,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:55,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:55,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,316 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-06-05 04:51:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,341 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:51:55,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:55,342 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:51:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:55,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973516594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:55,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:55,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261790924] [2021-06-05 04:51:55,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:55,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:55,365 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:55,610 INFO L93 Difference]: Finished difference Result 195 states and 410 transitions. [2021-06-05 04:51:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:55,611 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:51:55,611 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:51:55,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:51:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 148. [2021-06-05 04:51:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 04:51:55,612 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 04:51:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:55,612 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 04:51:55,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 04:51:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:55,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:55,613 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20265 [2021-06-05 04:51:55,813 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1511223394, now seen corresponding path program 397 times [2021-06-05 04:51:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954146193] [2021-06-05 04:51:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:55,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954146193] [2021-06-05 04:51:55,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954146193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42693494] [2021-06-05 04:51:55,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:55,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42693494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735529092] [2021-06-05 04:51:56,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:56,192 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:56,378 INFO L93 Difference]: Finished difference Result 162 states and 345 transitions. [2021-06-05 04:51:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:56,379 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:51:56,379 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:51:56,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:51:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2021-06-05 04:51:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 04:51:56,380 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 04:51:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:56,380 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 04:51:56,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 04:51:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:56,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:56,380 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:56,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20307,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:56,581 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash -476140349, now seen corresponding path program 398 times [2021-06-05 04:51:56,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:56,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062863495] [2021-06-05 04:51:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062863495] [2021-06-05 04:51:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062863495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947984574] [2021-06-05 04:51:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:56,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:56,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:56,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:56,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:56,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:56,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,018 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 04:51:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:57,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:57,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:57,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:57,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:57,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:57,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:57,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:57,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:57,220 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:51:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947984574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:57,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:57,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166230246] [2021-06-05 04:51:57,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:57,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:57,248 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:57,400 INFO L93 Difference]: Finished difference Result 176 states and 363 transitions. [2021-06-05 04:51:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:57,400 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:51:57,400 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:51:57,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:51:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 146. [2021-06-05 04:51:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 04:51:57,402 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 04:51:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:57,402 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 04:51:57,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 04:51:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:57,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:57,402 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:57,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20345 [2021-06-05 04:51:57,602 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 775242316, now seen corresponding path program 399 times [2021-06-05 04:51:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102793341] [2021-06-05 04:51:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:57,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102793341] [2021-06-05 04:51:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102793341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:57,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817312503] [2021-06-05 04:51:57,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:51:57,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817312503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:58,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418107731] [2021-06-05 04:51:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:58,021 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:58,190 INFO L93 Difference]: Finished difference Result 219 states and 451 transitions. [2021-06-05 04:51:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:58,191 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:51:58,191 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:51:58,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:51:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2021-06-05 04:51:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 04:51:58,193 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 19 [2021-06-05 04:51:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:58,193 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 04:51:58,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 04:51:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:58,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:58,193 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:58,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20368 [2021-06-05 04:51:58,393 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1458707874, now seen corresponding path program 400 times [2021-06-05 04:51:58,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:58,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686300930] [2021-06-05 04:51:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:58,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686300930] [2021-06-05 04:51:58,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686300930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873704563] [2021-06-05 04:51:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:58,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:58,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873704563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:58,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322900088] [2021-06-05 04:51:58,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:58,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:58,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:58,711 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:58,869 INFO L93 Difference]: Finished difference Result 178 states and 378 transitions. [2021-06-05 04:51:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:58,870 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:51:58,870 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:51:58,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:51:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2021-06-05 04:51:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1527777777777777) internal successors, (310), 144 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 310 transitions. [2021-06-05 04:51:58,871 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 310 transitions. Word has length 19 [2021-06-05 04:51:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:58,871 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 310 transitions. [2021-06-05 04:51:58,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 310 transitions. [2021-06-05 04:51:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:58,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:58,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:59,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20417,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:59,072 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1823428409, now seen corresponding path program 401 times [2021-06-05 04:51:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:59,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807756901] [2021-06-05 04:51:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:59,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:59,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807756901] [2021-06-05 04:51:59,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807756901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:59,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880810446] [2021-06-05 04:51:59,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:59,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:59,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880810446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:59,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:59,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:51:59,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594014462] [2021-06-05 04:51:59,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:59,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:59,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:59,425 INFO L87 Difference]: Start difference. First operand 145 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:59,572 INFO L93 Difference]: Finished difference Result 157 states and 330 transitions. [2021-06-05 04:51:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:51:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:59,572 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:51:59,572 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:51:59,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:51:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 142. [2021-06-05 04:51:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-06-05 04:51:59,574 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 19 [2021-06-05 04:51:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:59,574 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-06-05 04:51:59,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-06-05 04:51:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:51:59,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:59,574 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:59,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20434 [2021-06-05 04:51:59,775 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:59,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2133167473, now seen corresponding path program 402 times [2021-06-05 04:51:59,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:59,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522477133] [2021-06-05 04:51:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:59,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:59,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522477133] [2021-06-05 04:51:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522477133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134646810] [2021-06-05 04:51:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:59,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:51:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:00,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:00,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,115 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:52:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:00,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:00,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:52:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:00,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134646810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:00,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:00,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419267866] [2021-06-05 04:52:00,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:00,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:00,127 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:00,311 INFO L93 Difference]: Finished difference Result 185 states and 389 transitions. [2021-06-05 04:52:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:00,311 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:52:00,311 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:52:00,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:52:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2021-06-05 04:52:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 04:52:00,313 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 04:52:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:00,313 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 04:52:00,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 04:52:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:00,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:00,313 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:00,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20453,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:00,514 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1118652995, now seen corresponding path program 403 times [2021-06-05 04:52:00,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:00,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471775014] [2021-06-05 04:52:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:00,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471775014] [2021-06-05 04:52:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471775014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40320905] [2021-06-05 04:52:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:00,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:00,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:00,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:00,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:00,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:00,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:00,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:00,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:00,954 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:00,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:00,987 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:52:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:00,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,011 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:01,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:01,012 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40320905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:01,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:01,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:01,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371122814] [2021-06-05 04:52:01,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:01,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:01,035 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:01,252 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-06-05 04:52:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:01,253 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:52:01,253 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:52:01,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:52:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-06-05 04:52:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:01,255 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:01,255 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:01,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:01,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:01,255 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:01,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20478 [2021-06-05 04:52:01,455 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -889848591, now seen corresponding path program 404 times [2021-06-05 04:52:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:01,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20389174] [2021-06-05 04:52:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:01,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:01,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20389174] [2021-06-05 04:52:01,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20389174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:01,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133632363] [2021-06-05 04:52:01,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:01,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:01,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:01,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:01,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,892 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:52:01,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:01,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:01,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,989 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:02,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:02,017 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:02,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:02,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:02,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:02,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:02,072 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:02,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:02,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:02,101 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133632363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:02,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:02,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:02,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857109380] [2021-06-05 04:52:02,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:02,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:02,136 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:02,329 INFO L93 Difference]: Finished difference Result 178 states and 369 transitions. [2021-06-05 04:52:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:02,329 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:52:02,329 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:52:02,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:52:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 148. [2021-06-05 04:52:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 04:52:02,331 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 04:52:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:02,331 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 04:52:02,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 04:52:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:02,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:02,331 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:02,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20559,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:02,532 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1259060594, now seen corresponding path program 405 times [2021-06-05 04:52:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:02,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322203211] [2021-06-05 04:52:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:02,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322203211] [2021-06-05 04:52:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322203211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394022346] [2021-06-05 04:52:02,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:02,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394022346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:02,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:02,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:02,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855763297] [2021-06-05 04:52:02,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:02,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:02,936 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:03,213 INFO L93 Difference]: Finished difference Result 222 states and 457 transitions. [2021-06-05 04:52:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:52:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:03,214 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:52:03,214 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 04:52:03,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:52:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 04:52:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 149. [2021-06-05 04:52:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:52:03,215 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 19 [2021-06-05 04:52:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:03,215 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:52:03,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:52:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:03,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:03,216 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:03,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20580,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:03,416 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash 723830792, now seen corresponding path program 406 times [2021-06-05 04:52:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:03,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446507074] [2021-06-05 04:52:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:03,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:03,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446507074] [2021-06-05 04:52:03,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446507074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:03,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200753180] [2021-06-05 04:52:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:03,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:03,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200753180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:03,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:03,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:03,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119685963] [2021-06-05 04:52:03,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:03,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:03,737 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:03,966 INFO L93 Difference]: Finished difference Result 179 states and 380 transitions. [2021-06-05 04:52:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:03,967 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:52:03,967 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:52:03,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:52:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2021-06-05 04:52:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 04:52:03,968 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 04:52:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:03,968 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 04:52:03,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 04:52:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:03,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:03,968 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:04,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20632 [2021-06-05 04:52:04,169 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash 359110257, now seen corresponding path program 407 times [2021-06-05 04:52:04,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:04,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340810984] [2021-06-05 04:52:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:04,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:04,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340810984] [2021-06-05 04:52:04,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340810984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:04,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366919628] [2021-06-05 04:52:04,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:04,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366919628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128961968] [2021-06-05 04:52:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:04,524 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:04,756 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-06-05 04:52:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:04,757 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:52:04,757 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:52:04,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:52:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 04:52:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:04,758 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:04,758 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:04,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:04,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:04,758 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:04,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20653,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:04,959 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 150387207, now seen corresponding path program 408 times [2021-06-05 04:52:04,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:04,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871032004] [2021-06-05 04:52:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:05,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871032004] [2021-06-05 04:52:05,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871032004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924466841] [2021-06-05 04:52:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:05,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:05,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:05,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:05,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:05,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,430 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:52:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:05,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:05,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:05,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:05,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:05,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:05,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:05,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:05,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:05,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:05,641 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924466841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:05,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:05,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309677939] [2021-06-05 04:52:05,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:05,670 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:05,850 INFO L93 Difference]: Finished difference Result 183 states and 380 transitions. [2021-06-05 04:52:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:05,851 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:52:05,851 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:52:05,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:52:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2021-06-05 04:52:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1554054054054053) internal successors, (319), 148 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 319 transitions. [2021-06-05 04:52:05,852 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 319 transitions. Word has length 19 [2021-06-05 04:52:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:05,852 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 319 transitions. [2021-06-05 04:52:05,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 319 transitions. [2021-06-05 04:52:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:05,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:05,853 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:06,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20671 [2021-06-05 04:52:06,053 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1995670904, now seen corresponding path program 409 times [2021-06-05 04:52:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:06,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44536056] [2021-06-05 04:52:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:06,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:06,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44536056] [2021-06-05 04:52:06,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44536056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:06,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191994005] [2021-06-05 04:52:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191994005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:06,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:06,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:06,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642753349] [2021-06-05 04:52:06,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:06,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:06,419 INFO L87 Difference]: Start difference. First operand 149 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:06,806 INFO L93 Difference]: Finished difference Result 232 states and 476 transitions. [2021-06-05 04:52:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:06,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:06,807 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:52:06,807 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:52:06,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:52:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:52:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 151. [2021-06-05 04:52:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.18) internal successors, (327), 150 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 327 transitions. [2021-06-05 04:52:06,808 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 327 transitions. Word has length 19 [2021-06-05 04:52:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:06,808 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 327 transitions. [2021-06-05 04:52:06,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 327 transitions. [2021-06-05 04:52:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:06,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:06,809 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:07,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20693 [2021-06-05 04:52:07,009 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1764066590, now seen corresponding path program 410 times [2021-06-05 04:52:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:07,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585532763] [2021-06-05 04:52:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:07,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:07,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585532763] [2021-06-05 04:52:07,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585532763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:07,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27264105] [2021-06-05 04:52:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:07,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:07,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:07,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27264105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:07,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:07,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:07,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219652731] [2021-06-05 04:52:07,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:07,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:07,349 INFO L87 Difference]: Start difference. First operand 151 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:07,690 INFO L93 Difference]: Finished difference Result 192 states and 405 transitions. [2021-06-05 04:52:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:07,691 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:52:07,691 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:52:07,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:52:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:52:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-05 04:52:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.18) internal successors, (327), 150 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 327 transitions. [2021-06-05 04:52:07,693 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 327 transitions. Word has length 19 [2021-06-05 04:52:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:07,693 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 327 transitions. [2021-06-05 04:52:07,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 327 transitions. [2021-06-05 04:52:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:07,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:07,693 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:07,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:07,893 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1399346055, now seen corresponding path program 411 times [2021-06-05 04:52:07,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:07,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532429992] [2021-06-05 04:52:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:07,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:07,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532429992] [2021-06-05 04:52:07,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532429992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:07,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477956012] [2021-06-05 04:52:07,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:08,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:08,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:08,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477956012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:08,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:08,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981293324] [2021-06-05 04:52:08,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:08,275 INFO L87 Difference]: Start difference. First operand 151 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:08,519 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 04:52:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:08,520 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:52:08,520 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:52:08,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:52:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2021-06-05 04:52:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.174496644295302) internal successors, (324), 149 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 324 transitions. [2021-06-05 04:52:08,521 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 324 transitions. Word has length 19 [2021-06-05 04:52:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:08,521 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 324 transitions. [2021-06-05 04:52:08,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 324 transitions. [2021-06-05 04:52:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:08,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:08,521 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:08,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20741 [2021-06-05 04:52:08,722 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1943155384, now seen corresponding path program 412 times [2021-06-05 04:52:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:08,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205046313] [2021-06-05 04:52:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205046313] [2021-06-05 04:52:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205046313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802507821] [2021-06-05 04:52:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:08,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:09,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802507821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:09,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:09,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:09,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452450123] [2021-06-05 04:52:09,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:09,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:09,064 INFO L87 Difference]: Start difference. First operand 150 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:09,268 INFO L93 Difference]: Finished difference Result 182 states and 383 transitions. [2021-06-05 04:52:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:09,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:09,269 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:52:09,269 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:52:09,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:52:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 147. [2021-06-05 04:52:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 04:52:09,270 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 04:52:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:09,270 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 04:52:09,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 04:52:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:09,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:09,270 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:09,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20760,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:09,471 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 386653523, now seen corresponding path program 413 times [2021-06-05 04:52:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:09,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838105707] [2021-06-05 04:52:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:09,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838105707] [2021-06-05 04:52:09,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838105707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220598586] [2021-06-05 04:52:09,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:09,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:09,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220598586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:09,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:09,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:09,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341626192] [2021-06-05 04:52:09,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:09,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:09,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:09,873 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:10,116 INFO L93 Difference]: Finished difference Result 160 states and 335 transitions. [2021-06-05 04:52:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:10,116 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:52:10,116 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:52:10,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:52:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 04:52:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:10,117 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:10,118 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:10,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:10,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:10,118 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:10,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20790 [2021-06-05 04:52:10,318 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1771188333, now seen corresponding path program 414 times [2021-06-05 04:52:10,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:10,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809278933] [2021-06-05 04:52:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:10,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:10,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809278933] [2021-06-05 04:52:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809278933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:10,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776951588] [2021-06-05 04:52:10,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:10,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:10,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:52:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:10,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:10,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:10,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:10,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,702 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:10,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:10,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,709 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:10,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776951588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:10,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:10,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:10,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343645646] [2021-06-05 04:52:10,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:10,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:10,714 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:10,930 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 04:52:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:10,930 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:52:10,930 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:52:10,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:52:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 146. [2021-06-05 04:52:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:10,932 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:10,932 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:10,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:10,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:10,932 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:11,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20812,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:11,132 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 386010587, now seen corresponding path program 415 times [2021-06-05 04:52:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:11,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690967350] [2021-06-05 04:52:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:11,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690967350] [2021-06-05 04:52:11,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690967350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858522552] [2021-06-05 04:52:11,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:11,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:11,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:11,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:11,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:11,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:11,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:11,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,519 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:11,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:11,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:11,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,526 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858522552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:11,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:11,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668087443] [2021-06-05 04:52:11,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:11,531 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:11,847 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-06-05 04:52:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:11,848 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:52:11,848 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:52:11,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:52:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:52:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 147. [2021-06-05 04:52:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.143835616438356) internal successors, (313), 146 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 313 transitions. [2021-06-05 04:52:11,849 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 313 transitions. Word has length 19 [2021-06-05 04:52:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:11,849 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 313 transitions. [2021-06-05 04:52:11,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 313 transitions. [2021-06-05 04:52:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:11,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:11,850 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:12,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20853 [2021-06-05 04:52:12,050 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -628503891, now seen corresponding path program 416 times [2021-06-05 04:52:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:12,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015751627] [2021-06-05 04:52:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:12,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:12,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015751627] [2021-06-05 04:52:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015751627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:12,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544770947] [2021-06-05 04:52:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:12,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:12,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:12,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:12,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:12,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:12,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:12,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:12,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:12,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:12,518 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,548 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:52:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:12,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,573 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:12,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:12,574 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544770947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:12,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:12,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590284828] [2021-06-05 04:52:12,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:12,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:12,597 INFO L87 Difference]: Start difference. First operand 147 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:12,983 INFO L93 Difference]: Finished difference Result 211 states and 441 transitions. [2021-06-05 04:52:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:52:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:12,983 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:52:12,983 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:52:12,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:52:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:52:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 148. [2021-06-05 04:52:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.142857142857143) internal successors, (315), 147 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 315 transitions. [2021-06-05 04:52:12,985 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 315 transitions. Word has length 19 [2021-06-05 04:52:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:12,985 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 315 transitions. [2021-06-05 04:52:12,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 315 transitions. [2021-06-05 04:52:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:12,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:12,985 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:13,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20895 [2021-06-05 04:52:13,205 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1075841614, now seen corresponding path program 417 times [2021-06-05 04:52:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:13,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562231729] [2021-06-05 04:52:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:13,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562231729] [2021-06-05 04:52:13,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562231729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552096371] [2021-06-05 04:52:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:13,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:13,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552096371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:13,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:13,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:13,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407034419] [2021-06-05 04:52:13,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:13,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:13,583 INFO L87 Difference]: Start difference. First operand 148 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:13,772 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 04:52:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:13,772 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:52:13,772 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:52:13,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:52:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-06-05 04:52:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 04:52:13,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 04:52:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:13,774 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 04:52:13,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 04:52:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:13,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:13,774 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:13,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20981,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:13,975 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1426246385, now seen corresponding path program 418 times [2021-06-05 04:52:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:13,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304877837] [2021-06-05 04:52:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:14,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:14,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304877837] [2021-06-05 04:52:14,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304877837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:14,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709673062] [2021-06-05 04:52:14,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:14,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:14,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:14,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:14,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:14,319 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:52:14,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:14,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:14,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:14,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:14,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:52:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:14,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709673062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:14,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:14,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:14,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225036616] [2021-06-05 04:52:14,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:14,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:14,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:14,331 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:14,516 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 04:52:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:14,517 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:52:14,517 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:52:14,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:52:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-06-05 04:52:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.143835616438356) internal successors, (313), 146 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 313 transitions. [2021-06-05 04:52:14,518 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 313 transitions. Word has length 19 [2021-06-05 04:52:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 313 transitions. [2021-06-05 04:52:14,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 313 transitions. [2021-06-05 04:52:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:14,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:14,519 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:14,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21018 [2021-06-05 04:52:14,719 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2110452295, now seen corresponding path program 419 times [2021-06-05 04:52:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:14,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877684603] [2021-06-05 04:52:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:14,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877684603] [2021-06-05 04:52:14,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877684603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171098983] [2021-06-05 04:52:14,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:14,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:15,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:15,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:15,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:15,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:15,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:15,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:15,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:15,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:15,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:15,104 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:52:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:15,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:15,129 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:15,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:15,130 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:52:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:15,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171098983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:15,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:15,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:15,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102156275] [2021-06-05 04:52:15,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:15,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:15,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:15,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:15,151 INFO L87 Difference]: Start difference. First operand 147 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:15,450 INFO L93 Difference]: Finished difference Result 205 states and 430 transitions. [2021-06-05 04:52:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:52:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:15,450 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:52:15,450 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:52:15,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:52:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:52:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 148. [2021-06-05 04:52:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.142857142857143) internal successors, (315), 147 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 315 transitions. [2021-06-05 04:52:15,452 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 315 transitions. Word has length 19 [2021-06-05 04:52:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:15,452 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 315 transitions. [2021-06-05 04:52:15,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 315 transitions. [2021-06-05 04:52:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:15,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:15,453 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:15,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21044 [2021-06-05 04:52:15,669 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -35605816, now seen corresponding path program 420 times [2021-06-05 04:52:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:15,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977728338] [2021-06-05 04:52:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:15,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:15,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977728338] [2021-06-05 04:52:15,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977728338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:15,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987154096] [2021-06-05 04:52:15,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:15,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987154096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766501292] [2021-06-05 04:52:16,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:16,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:16,062 INFO L87 Difference]: Start difference. First operand 148 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:16,275 INFO L93 Difference]: Finished difference Result 167 states and 354 transitions. [2021-06-05 04:52:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:16,275 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:52:16,276 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:52:16,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:52:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2021-06-05 04:52:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:16,277 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:16,277 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:16,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:16,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:16,277 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:16,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21087 [2021-06-05 04:52:16,478 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash 999477229, now seen corresponding path program 421 times [2021-06-05 04:52:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:16,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260406863] [2021-06-05 04:52:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:16,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:16,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260406863] [2021-06-05 04:52:16,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260406863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504049162] [2021-06-05 04:52:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:16,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:16,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:16,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:16,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:16,914 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:52:16,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:16,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:16,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:16,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:16,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:16,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:17,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:17,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:17,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:17,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:17,050 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:17,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:17,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:17,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:17,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:17,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:17,104 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:17,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:17,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:17,127 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:17,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504049162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:17,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:17,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965627266] [2021-06-05 04:52:17,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:17,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:17,156 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:17,350 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-06-05 04:52:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:17,350 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:52:17,350 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:52:17,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:52:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 148. [2021-06-05 04:52:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 04:52:17,352 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 04:52:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:17,352 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 04:52:17,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 04:52:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:17,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:17,352 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:17,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21124,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:17,553 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 552139506, now seen corresponding path program 422 times [2021-06-05 04:52:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950619045] [2021-06-05 04:52:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:17,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:17,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950619045] [2021-06-05 04:52:17,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950619045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:17,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742078173] [2021-06-05 04:52:17,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:17,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:17,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:17,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742078173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:17,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:17,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:17,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146966095] [2021-06-05 04:52:17,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:17,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:17,962 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:18,172 INFO L93 Difference]: Finished difference Result 228 states and 471 transitions. [2021-06-05 04:52:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:52:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:18,172 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:52:18,172 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:52:18,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:52:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 149. [2021-06-05 04:52:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 04:52:18,174 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 19 [2021-06-05 04:52:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:18,174 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 04:52:18,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 04:52:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:18,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:18,174 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:18,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21144 [2021-06-05 04:52:18,377 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 16909704, now seen corresponding path program 423 times [2021-06-05 04:52:18,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:18,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706693956] [2021-06-05 04:52:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:18,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:18,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706693956] [2021-06-05 04:52:18,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706693956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:18,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122635375] [2021-06-05 04:52:18,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:18,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:52:18,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:18,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122635375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:18,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:18,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650527211] [2021-06-05 04:52:18,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:18,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:18,705 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:18,881 INFO L93 Difference]: Finished difference Result 188 states and 399 transitions. [2021-06-05 04:52:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:18,881 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:52:18,881 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:52:18,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:52:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-06-05 04:52:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 04:52:18,883 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 04:52:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:18,883 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 04:52:18,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 04:52:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:18,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:18,883 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:19,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21197,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:19,084 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash -347810831, now seen corresponding path program 424 times [2021-06-05 04:52:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:19,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500040862] [2021-06-05 04:52:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:19,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500040862] [2021-06-05 04:52:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500040862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802820379] [2021-06-05 04:52:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:19,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:19,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:19,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802820379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:19,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:19,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:19,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688019668] [2021-06-05 04:52:19,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:19,455 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:19,716 INFO L93 Difference]: Finished difference Result 161 states and 338 transitions. [2021-06-05 04:52:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:19,717 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:52:19,717 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:52:19,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:52:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-06-05 04:52:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-06-05 04:52:19,718 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 19 [2021-06-05 04:52:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:19,718 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-06-05 04:52:19,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-06-05 04:52:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:19,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:19,719 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:19,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21213 [2021-06-05 04:52:19,919 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -686182245, now seen corresponding path program 425 times [2021-06-05 04:52:19,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:19,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948149699] [2021-06-05 04:52:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:19,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:19,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948149699] [2021-06-05 04:52:19,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948149699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:19,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112032866] [2021-06-05 04:52:19,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:20,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:20,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:20,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:20,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:20,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,265 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:52:20,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:20,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:20,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:52:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:20,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112032866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:20,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:20,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684109127] [2021-06-05 04:52:20,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:20,277 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:20,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:20,444 INFO L93 Difference]: Finished difference Result 176 states and 371 transitions. [2021-06-05 04:52:20,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:20,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:20,445 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:52:20,445 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:52:20,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:52:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2021-06-05 04:52:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 04:52:20,446 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 04:52:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:20,446 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 04:52:20,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 04:52:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:20,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:20,447 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:20,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21233,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:20,647 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1976335, now seen corresponding path program 426 times [2021-06-05 04:52:20,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:20,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351255552] [2021-06-05 04:52:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:20,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351255552] [2021-06-05 04:52:20,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351255552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159288266] [2021-06-05 04:52:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:20,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:52:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:21,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:21,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:21,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:21,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:21,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:21,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:21,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:21,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,111 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 04:52:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:21,113 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,136 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:21,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:21,137 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:21,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159288266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:21,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:21,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117745725] [2021-06-05 04:52:21,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:21,159 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:21,298 INFO L93 Difference]: Finished difference Result 198 states and 416 transitions. [2021-06-05 04:52:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:21,299 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:52:21,299 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:52:21,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:52:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 146. [2021-06-05 04:52:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 04:52:21,300 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 04:52:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:21,300 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 04:52:21,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 04:52:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:21,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:21,301 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:21,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21258 [2021-06-05 04:52:21,501 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2146932850, now seen corresponding path program 427 times [2021-06-05 04:52:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:21,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414880852] [2021-06-05 04:52:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:21,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414880852] [2021-06-05 04:52:21,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414880852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520059114] [2021-06-05 04:52:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:21,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520059114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:21,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464119626] [2021-06-05 04:52:21,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:21,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:21,889 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:22,015 INFO L93 Difference]: Finished difference Result 159 states and 337 transitions. [2021-06-05 04:52:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:22,015 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:52:22,015 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:52:22,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:52:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2021-06-05 04:52:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-06-05 04:52:22,017 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 19 [2021-06-05 04:52:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:22,017 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-06-05 04:52:22,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-06-05 04:52:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:22,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:22,017 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:22,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21328,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:22,218 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 585768987, now seen corresponding path program 428 times [2021-06-05 04:52:22,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:22,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283866303] [2021-06-05 04:52:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:22,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283866303] [2021-06-05 04:52:22,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283866303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763440414] [2021-06-05 04:52:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:22,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:22,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:22,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,652 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:52:22,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:22,859 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:22,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763440414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:22,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:22,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:22,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299522572] [2021-06-05 04:52:22,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:22,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:22,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:22,888 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:23,095 INFO L93 Difference]: Finished difference Result 181 states and 374 transitions. [2021-06-05 04:52:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:23,095 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:52:23,095 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:52:23,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:52:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 146. [2021-06-05 04:52:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 04:52:23,097 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 04:52:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:23,097 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 04:52:23,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 04:52:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:23,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:23,097 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:23,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21366 [2021-06-05 04:52:23,298 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1560289124, now seen corresponding path program 429 times [2021-06-05 04:52:23,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:23,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375099195] [2021-06-05 04:52:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:23,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375099195] [2021-06-05 04:52:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375099195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:23,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883961106] [2021-06-05 04:52:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:23,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:52:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:23,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883961106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:23,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:23,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:23,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808940645] [2021-06-05 04:52:23,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:23,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:23,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:23,713 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:23,954 INFO L93 Difference]: Finished difference Result 213 states and 438 transitions. [2021-06-05 04:52:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:23,954 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:52:23,954 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:52:23,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:52:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:52:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 147. [2021-06-05 04:52:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 04:52:23,956 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 19 [2021-06-05 04:52:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:23,956 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 04:52:23,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:23,956 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 04:52:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:23,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:23,956 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21388,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:24,157 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2095518926, now seen corresponding path program 430 times [2021-06-05 04:52:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836567417] [2021-06-05 04:52:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:24,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:24,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836567417] [2021-06-05 04:52:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836567417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:24,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88682306] [2021-06-05 04:52:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:24,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:24,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88682306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:24,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:24,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:24,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509998747] [2021-06-05 04:52:24,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:24,475 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:24,683 INFO L93 Difference]: Finished difference Result 177 states and 376 transitions. [2021-06-05 04:52:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:24,683 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:52:24,683 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:52:24,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:52:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2021-06-05 04:52:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1527777777777777) internal successors, (310), 144 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 310 transitions. [2021-06-05 04:52:24,685 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 310 transitions. Word has length 19 [2021-06-05 04:52:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:24,685 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 310 transitions. [2021-06-05 04:52:24,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 310 transitions. [2021-06-05 04:52:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:24,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:24,685 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:24,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21441 [2021-06-05 04:52:24,886 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1834727835, now seen corresponding path program 431 times [2021-06-05 04:52:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:24,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269319262] [2021-06-05 04:52:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:24,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:24,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269319262] [2021-06-05 04:52:24,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269319262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:24,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598772187] [2021-06-05 04:52:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:25,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598772187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:25,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:25,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:25,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093901219] [2021-06-05 04:52:25,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:25,241 INFO L87 Difference]: Start difference. First operand 145 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:25,451 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2021-06-05 04:52:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:25,451 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:52:25,451 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:52:25,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:52:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2021-06-05 04:52:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.147887323943662) internal successors, (305), 142 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 305 transitions. [2021-06-05 04:52:25,453 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 305 transitions. Word has length 19 [2021-06-05 04:52:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:25,453 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 305 transitions. [2021-06-05 04:52:25,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 305 transitions. [2021-06-05 04:52:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:25,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:25,453 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:25,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-05 04:52:25,654 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1626004785, now seen corresponding path program 432 times [2021-06-05 04:52:25,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:25,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304831597] [2021-06-05 04:52:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:25,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304831597] [2021-06-05 04:52:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304831597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16198978] [2021-06-05 04:52:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:25,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:26,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:26,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,136 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:52:26,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:26,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:26,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:26,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:26,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:26,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:26,290 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:26,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:26,340 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16198978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:26,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:26,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:26,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986675792] [2021-06-05 04:52:26,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:26,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:26,369 INFO L87 Difference]: Start difference. First operand 143 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:26,529 INFO L93 Difference]: Finished difference Result 186 states and 386 transitions. [2021-06-05 04:52:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:26,530 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:52:26,530 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:52:26,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:52:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 146. [2021-06-05 04:52:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 04:52:26,531 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 19 [2021-06-05 04:52:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:26,531 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 04:52:26,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 04:52:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:26,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:26,532 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:26,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-05 04:52:26,732 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -520053326, now seen corresponding path program 433 times [2021-06-05 04:52:26,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:26,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360085940] [2021-06-05 04:52:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:26,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:26,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360085940] [2021-06-05 04:52:26,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360085940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:26,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238529775] [2021-06-05 04:52:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:26,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:27,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238529775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:27,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828641017] [2021-06-05 04:52:27,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:27,224 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:27,637 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-05 04:52:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:52:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:27,637 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:52:27,637 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:52:27,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:52:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:52:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 148. [2021-06-05 04:52:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 04:52:27,639 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 19 [2021-06-05 04:52:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:27,639 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 04:52:27,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 04:52:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:27,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:27,639 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:27,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21498,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:27,840 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:27,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1055283128, now seen corresponding path program 434 times [2021-06-05 04:52:27,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:27,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415178582] [2021-06-05 04:52:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:27,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415178582] [2021-06-05 04:52:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415178582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496322025] [2021-06-05 04:52:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:28,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:28,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:28,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:28,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496322025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:28,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:28,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:28,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805650265] [2021-06-05 04:52:28,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:28,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:28,215 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:28,527 INFO L93 Difference]: Finished difference Result 189 states and 399 transitions. [2021-06-05 04:52:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:28,527 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:52:28,527 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:52:28,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:52:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:52:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-06-05 04:52:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 04:52:28,529 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 19 [2021-06-05 04:52:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:28,529 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 04:52:28,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 04:52:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:28,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:28,529 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:28,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-05 04:52:28,730 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1420003663, now seen corresponding path program 435 times [2021-06-05 04:52:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089140547] [2021-06-05 04:52:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:28,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089140547] [2021-06-05 04:52:28,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089140547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189352348] [2021-06-05 04:52:28,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:28,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:29,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189352348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:29,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:29,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146917731] [2021-06-05 04:52:29,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:29,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:29,171 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:29,426 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 04:52:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:29,427 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:52:29,427 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:52:29,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:52:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2021-06-05 04:52:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-06-05 04:52:29,429 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 19 [2021-06-05 04:52:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:29,429 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-06-05 04:52:29,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-06-05 04:52:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:29,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:29,429 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:29,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21583,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:29,629 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash -467537806, now seen corresponding path program 436 times [2021-06-05 04:52:29,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:29,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956238999] [2021-06-05 04:52:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:29,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956238999] [2021-06-05 04:52:29,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956238999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3229916] [2021-06-05 04:52:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:29,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:29,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:29,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3229916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:29,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:29,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590815801] [2021-06-05 04:52:29,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:29,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:29,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:29,992 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:30,161 INFO L93 Difference]: Finished difference Result 179 states and 377 transitions. [2021-06-05 04:52:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:30,161 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:52:30,161 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:52:30,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:52:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 144. [2021-06-05 04:52:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1538461538461537) internal successors, (308), 143 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 308 transitions. [2021-06-05 04:52:30,163 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 308 transitions. Word has length 19 [2021-06-05 04:52:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:30,163 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 308 transitions. [2021-06-05 04:52:30,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 308 transitions. [2021-06-05 04:52:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:30,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:30,163 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:30,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21611 [2021-06-05 04:52:30,363 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1862271101, now seen corresponding path program 437 times [2021-06-05 04:52:30,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:30,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370935429] [2021-06-05 04:52:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370935429] [2021-06-05 04:52:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370935429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528722489] [2021-06-05 04:52:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:30,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:30,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:30,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528722489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:30,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:30,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:30,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898306368] [2021-06-05 04:52:30,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:30,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:30,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:30,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:30,773 INFO L87 Difference]: Start difference. First operand 144 states and 308 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:31,012 INFO L93 Difference]: Finished difference Result 157 states and 329 transitions. [2021-06-05 04:52:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:52:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:31,012 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:52:31,012 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:52:31,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:52:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2021-06-05 04:52:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 04:52:31,014 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 04:52:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:31,014 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 04:52:31,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 04:52:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:31,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:31,014 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:31,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21640 [2021-06-05 04:52:31,214 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1746960335, now seen corresponding path program 438 times [2021-06-05 04:52:31,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:31,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517565129] [2021-06-05 04:52:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:31,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:31,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517565129] [2021-06-05 04:52:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517565129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548334756] [2021-06-05 04:52:31,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:31,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:52:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:31,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:31,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:31,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:31,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:31,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:31,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,585 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:31,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:31,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:31,591 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:31,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548334756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:31,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:31,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:31,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481832851] [2021-06-05 04:52:31,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:31,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:31,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:31,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:31,596 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:31,773 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2021-06-05 04:52:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:31,774 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:52:31,774 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:52:31,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:52:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-06-05 04:52:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 04:52:31,775 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 04:52:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:31,775 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 04:52:31,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 04:52:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:31,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:31,776 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:31,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21662,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:31,976 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1062754425, now seen corresponding path program 439 times [2021-06-05 04:52:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:31,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390659793] [2021-06-05 04:52:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:32,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:32,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390659793] [2021-06-05 04:52:32,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390659793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:32,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189115481] [2021-06-05 04:52:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:32,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:32,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:32,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:32,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:32,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:32,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:32,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:32,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:32,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:32,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,465 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:52:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:32,467 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,490 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:32,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:32,490 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:32,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189115481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:32,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:32,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:32,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983857001] [2021-06-05 04:52:32,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:32,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:32,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:32,513 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:32,649 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 04:52:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:32,650 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:52:32,650 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:52:32,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:52:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-06-05 04:52:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 04:52:32,651 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 04:52:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:32,652 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 04:52:32,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 04:52:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:32,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:32,652 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:32,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21693,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:32,852 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:32,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1086154760, now seen corresponding path program 440 times [2021-06-05 04:52:32,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:32,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552698342] [2021-06-05 04:52:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:32,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552698342] [2021-06-05 04:52:32,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552698342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543795797] [2021-06-05 04:52:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:33,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:33,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:33,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543795797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:33,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:33,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794224236] [2021-06-05 04:52:33,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:33,245 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:33,422 INFO L93 Difference]: Finished difference Result 155 states and 329 transitions. [2021-06-05 04:52:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:33,423 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:52:33,423 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:52:33,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:52:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2021-06-05 04:52:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.152173913043478) internal successors, (297), 138 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 297 transitions. [2021-06-05 04:52:33,424 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 297 transitions. Word has length 19 [2021-06-05 04:52:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:33,424 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 297 transitions. [2021-06-05 04:52:33,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 297 transitions. [2021-06-05 04:52:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:33,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:33,425 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:33,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21779 [2021-06-05 04:52:33,625 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2121237805, now seen corresponding path program 441 times [2021-06-05 04:52:33,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:33,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273344822] [2021-06-05 04:52:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273344822] [2021-06-05 04:52:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273344822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984195258] [2021-06-05 04:52:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:33,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:33,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:33,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:33,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:33,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:33,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:34,035 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 04:52:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:34,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:34,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:34,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:34,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:34,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:34,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:34,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:34,099 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:52:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:34,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984195258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:34,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:34,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:34,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074766845] [2021-06-05 04:52:34,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:34,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:34,128 INFO L87 Difference]: Start difference. First operand 139 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:34,376 INFO L93 Difference]: Finished difference Result 185 states and 374 transitions. [2021-06-05 04:52:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:34,377 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:52:34,377 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:52:34,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:52:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-06-05 04:52:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.157142857142857) internal successors, (302), 140 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 302 transitions. [2021-06-05 04:52:34,378 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 302 transitions. Word has length 19 [2021-06-05 04:52:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:34,378 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 302 transitions. [2021-06-05 04:52:34,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 302 transitions. [2021-06-05 04:52:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:34,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:34,379 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:34,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21816,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:34,579 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1673900082, now seen corresponding path program 442 times [2021-06-05 04:52:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589979928] [2021-06-05 04:52:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:34,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:34,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589979928] [2021-06-05 04:52:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589979928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:34,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808159599] [2021-06-05 04:52:34,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:34,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:34,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:34,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808159599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:34,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:34,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:34,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518136332] [2021-06-05 04:52:34,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:34,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:34,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:34,995 INFO L87 Difference]: Start difference. First operand 141 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:35,328 INFO L93 Difference]: Finished difference Result 215 states and 434 transitions. [2021-06-05 04:52:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:52:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:35,328 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:52:35,328 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:52:35,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:52:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:52:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2021-06-05 04:52:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 141 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 307 transitions. [2021-06-05 04:52:35,330 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 307 transitions. Word has length 19 [2021-06-05 04:52:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 307 transitions. [2021-06-05 04:52:35,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 307 transitions. [2021-06-05 04:52:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:35,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:35,331 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:35,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21840 [2021-06-05 04:52:35,553 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1138670280, now seen corresponding path program 443 times [2021-06-05 04:52:35,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:35,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751211839] [2021-06-05 04:52:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:35,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751211839] [2021-06-05 04:52:35,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751211839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121081784] [2021-06-05 04:52:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:35,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:35,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121081784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:35,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:35,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825858127] [2021-06-05 04:52:35,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:35,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:35,888 INFO L87 Difference]: Start difference. First operand 142 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:36,078 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2021-06-05 04:52:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:36,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:36,079 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:52:36,079 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:52:36,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:52:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-06-05 04:52:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.158273381294964) internal successors, (300), 139 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 300 transitions. [2021-06-05 04:52:36,080 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 300 transitions. Word has length 19 [2021-06-05 04:52:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:36,080 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 300 transitions. [2021-06-05 04:52:36,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 300 transitions. [2021-06-05 04:52:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:36,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:36,081 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:36,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21892 [2021-06-05 04:52:36,281 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 773949745, now seen corresponding path program 444 times [2021-06-05 04:52:36,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:36,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731546924] [2021-06-05 04:52:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:36,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731546924] [2021-06-05 04:52:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731546924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189633831] [2021-06-05 04:52:36,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:36,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:36,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189633831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:36,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:36,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211721852] [2021-06-05 04:52:36,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:36,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:36,676 INFO L87 Difference]: Start difference. First operand 140 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:36,850 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 04:52:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:36,851 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:52:36,851 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:52:36,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:52:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2021-06-05 04:52:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 04:52:36,852 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 04:52:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:36,852 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 04:52:36,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 04:52:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:36,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:36,852 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:37,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21908 [2021-06-05 04:52:37,053 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 565226695, now seen corresponding path program 445 times [2021-06-05 04:52:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:37,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491539641] [2021-06-05 04:52:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:37,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491539641] [2021-06-05 04:52:37,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491539641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352411442] [2021-06-05 04:52:37,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:37,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:37,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,492 INFO L628 ElimStorePlain]: treesize reduction 51, result has 53.2 percent of original size [2021-06-05 04:52:37,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:37,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:37,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:37,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:37,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:37,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:37,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:37,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:37,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 04:52:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:37,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352411442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:37,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:37,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544895653] [2021-06-05 04:52:37,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:37,607 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:37,904 INFO L93 Difference]: Finished difference Result 181 states and 375 transitions. [2021-06-05 04:52:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:37,905 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:52:37,905 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:52:37,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:52:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2021-06-05 04:52:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-06-05 04:52:37,906 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-06-05 04:52:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-06-05 04:52:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-06-05 04:52:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:37,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:37,907 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:38,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21930,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:38,107 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1580831416, now seen corresponding path program 446 times [2021-06-05 04:52:38,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:38,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903711197] [2021-06-05 04:52:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:38,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903711197] [2021-06-05 04:52:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903711197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309824308] [2021-06-05 04:52:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:38,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:38,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309824308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:38,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:38,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413222714] [2021-06-05 04:52:38,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:38,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:38,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:38,560 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:39,046 INFO L93 Difference]: Finished difference Result 233 states and 469 transitions. [2021-06-05 04:52:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:52:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:39,047 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:52:39,047 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:52:39,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:52:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:52:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 143. [2021-06-05 04:52:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:52:39,048 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:52:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:39,049 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:52:39,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:52:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:39,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:39,049 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:39,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21949,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:39,249 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2116061218, now seen corresponding path program 447 times [2021-06-05 04:52:39,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:39,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620304538] [2021-06-05 04:52:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:39,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:39,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620304538] [2021-06-05 04:52:39,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620304538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:39,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223123726] [2021-06-05 04:52:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:39,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:39,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:39,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223123726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:39,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:39,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:39,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102580120] [2021-06-05 04:52:39,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:39,591 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:39,942 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-06-05 04:52:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:39,942 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:52:39,942 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:52:39,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:52:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:52:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2021-06-05 04:52:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:52:39,944 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:52:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:39,944 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:52:39,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:52:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:39,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:39,944 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:40,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21997 [2021-06-05 04:52:40,145 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1814185543, now seen corresponding path program 448 times [2021-06-05 04:52:40,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:40,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640587780] [2021-06-05 04:52:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:40,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640587780] [2021-06-05 04:52:40,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640587780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961074455] [2021-06-05 04:52:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:40,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:40,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961074455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:40,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:40,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166945209] [2021-06-05 04:52:40,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:40,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:40,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:40,553 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:40,854 INFO L93 Difference]: Finished difference Result 162 states and 344 transitions. [2021-06-05 04:52:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:40,854 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:52:40,854 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:52:40,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:52:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 04:52:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 141 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 307 transitions. [2021-06-05 04:52:40,855 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 307 transitions. Word has length 19 [2021-06-05 04:52:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:40,856 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 307 transitions. [2021-06-05 04:52:40,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 307 transitions. [2021-06-05 04:52:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:40,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:40,856 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22018,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,056 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1528315896, now seen corresponding path program 449 times [2021-06-05 04:52:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061715457] [2021-06-05 04:52:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:41,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:41,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061715457] [2021-06-05 04:52:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061715457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4227088] [2021-06-05 04:52:41,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:41,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:41,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4227088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:41,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:41,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752024063] [2021-06-05 04:52:41,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:41,415 INFO L87 Difference]: Start difference. First operand 142 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:41,632 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 04:52:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:41,633 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:52:41,633 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:52:41,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:52:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-06-05 04:52:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 136 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 293 transitions. [2021-06-05 04:52:41,634 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 293 transitions. Word has length 19 [2021-06-05 04:52:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:41,634 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 293 transitions. [2021-06-05 04:52:41,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 293 transitions. [2021-06-05 04:52:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:41,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:41,635 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:41,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22043,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,835 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1547201935, now seen corresponding path program 450 times [2021-06-05 04:52:41,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:41,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576838442] [2021-06-05 04:52:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:41,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:41,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576838442] [2021-06-05 04:52:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576838442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107191800] [2021-06-05 04:52:41,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:42,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:42,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:42,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:42,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,412 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 04:52:42,412 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:52:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:42,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:42,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:42,612 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:42,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:42,634 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107191800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:42,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72351309] [2021-06-05 04:52:42,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:42,664 INFO L87 Difference]: Start difference. First operand 137 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:43,025 INFO L93 Difference]: Finished difference Result 191 states and 393 transitions. [2021-06-05 04:52:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:43,025 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:52:43,025 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:52:43,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:52:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-06-05 04:52:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 04:52:43,028 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 04:52:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:43,028 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 04:52:43,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 04:52:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:43,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:43,028 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:43,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22073,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:43,249 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 601707250, now seen corresponding path program 451 times [2021-06-05 04:52:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:43,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124320895] [2021-06-05 04:52:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:43,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:43,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124320895] [2021-06-05 04:52:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124320895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:43,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742613559] [2021-06-05 04:52:43,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:43,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742613559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:43,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:43,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396795814] [2021-06-05 04:52:43,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:43,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:43,753 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:44,389 INFO L93 Difference]: Finished difference Result 226 states and 455 transitions. [2021-06-05 04:52:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:52:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:44,389 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:52:44,389 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 04:52:44,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:52:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 04:52:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 144. [2021-06-05 04:52:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 04:52:44,391 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 04:52:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:44,391 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 04:52:44,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 04:52:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:44,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:44,391 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:44,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22094 [2021-06-05 04:52:44,592 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash 66477448, now seen corresponding path program 452 times [2021-06-05 04:52:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:44,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932004101] [2021-06-05 04:52:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:44,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:44,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932004101] [2021-06-05 04:52:44,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932004101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:44,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740151851] [2021-06-05 04:52:44,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:45,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740151851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:45,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:45,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:45,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737487950] [2021-06-05 04:52:45,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:45,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:45,013 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:45,453 INFO L93 Difference]: Finished difference Result 186 states and 393 transitions. [2021-06-05 04:52:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:45,453 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:52:45,453 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:52:45,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:52:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:52:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2021-06-05 04:52:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 04:52:45,455 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 04:52:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:45,455 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 04:52:45,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 04:52:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:45,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:45,455 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:45,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22156 [2021-06-05 04:52:45,656 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash -298243087, now seen corresponding path program 453 times [2021-06-05 04:52:45,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:45,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218319550] [2021-06-05 04:52:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:45,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:45,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218319550] [2021-06-05 04:52:45,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218319550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:45,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015626453] [2021-06-05 04:52:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:45,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:45,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:46,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015626453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:46,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618534848] [2021-06-05 04:52:46,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:46,130 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:46,537 INFO L93 Difference]: Finished difference Result 176 states and 371 transitions. [2021-06-05 04:52:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:46,537 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:52:46,537 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:52:46,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:52:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:52:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-06-05 04:52:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:52:46,539 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:52:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:46,539 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:52:46,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:52:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:46,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:46,539 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:46,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22173,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:46,740 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash 654222770, now seen corresponding path program 454 times [2021-06-05 04:52:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480706357] [2021-06-05 04:52:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:46,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480706357] [2021-06-05 04:52:46,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480706357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290706264] [2021-06-05 04:52:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:46,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:47,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290706264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:47,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:47,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:47,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280228513] [2021-06-05 04:52:47,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:47,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:47,086 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:47,381 INFO L93 Difference]: Finished difference Result 173 states and 367 transitions. [2021-06-05 04:52:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:47,382 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:52:47,382 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:52:47,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:52:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2021-06-05 04:52:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 04:52:47,383 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 04:52:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:47,383 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 04:52:47,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 04:52:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:47,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:47,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22192 [2021-06-05 04:52:47,584 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1694458568, now seen corresponding path program 455 times [2021-06-05 04:52:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247885715] [2021-06-05 04:52:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:47,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247885715] [2021-06-05 04:52:47,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247885715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825044304] [2021-06-05 04:52:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:47,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:47,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:47,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825044304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:47,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:47,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:47,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784017136] [2021-06-05 04:52:47,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:47,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:47,961 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:48,188 INFO L93 Difference]: Finished difference Result 164 states and 347 transitions. [2021-06-05 04:52:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:48,189 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:52:48,189 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 04:52:48,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 04:52:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2021-06-05 04:52:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1605839416058394) internal successors, (296), 137 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 296 transitions. [2021-06-05 04:52:48,190 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 296 transitions. Word has length 19 [2021-06-05 04:52:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:48,190 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 296 transitions. [2021-06-05 04:52:48,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 296 transitions. [2021-06-05 04:52:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:48,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:48,191 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:48,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22208,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:48,391 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1655334257, now seen corresponding path program 456 times [2021-06-05 04:52:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:48,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907334311] [2021-06-05 04:52:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:48,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:48,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907334311] [2021-06-05 04:52:48,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907334311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:48,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025116327] [2021-06-05 04:52:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:48,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:52:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:48,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025116327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:48,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:48,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:52:48,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878901837] [2021-06-05 04:52:48,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:48,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:48,857 INFO L87 Difference]: Start difference. First operand 138 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:49,155 INFO L93 Difference]: Finished difference Result 153 states and 320 transitions. [2021-06-05 04:52:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:49,156 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:52:49,156 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:52:49,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:52:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2021-06-05 04:52:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 04:52:49,157 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 04:52:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:49,157 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 04:52:49,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 04:52:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:49,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:49,157 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:49,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22238 [2021-06-05 04:52:49,358 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 529488319, now seen corresponding path program 457 times [2021-06-05 04:52:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:49,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409354081] [2021-06-05 04:52:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:49,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:49,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409354081] [2021-06-05 04:52:49,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409354081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:49,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83338988] [2021-06-05 04:52:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:49,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:49,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:49,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:49,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:49,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:49,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:49,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:49,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:49,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:49,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,702 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:49,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:49,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:49,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83338988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:49,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:49,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:49,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24205536] [2021-06-05 04:52:49,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:49,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:49,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:49,713 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:49,930 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 04:52:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:49,930 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:52:49,930 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:52:49,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:52:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-06-05 04:52:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 04:52:49,932 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 04:52:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:49,932 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 04:52:49,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 04:52:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:49,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:49,932 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:50,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22259 [2021-06-05 04:52:50,133 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -855689427, now seen corresponding path program 458 times [2021-06-05 04:52:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690930786] [2021-06-05 04:52:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690930786] [2021-06-05 04:52:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690930786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984748184] [2021-06-05 04:52:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:50,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:50,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:50,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:50,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:50,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:50,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:50,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,480 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:50,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:50,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,487 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984748184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:50,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:50,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607267787] [2021-06-05 04:52:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:50,492 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:50,810 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 04:52:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:50,810 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:52:50,810 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:52:50,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:52:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2021-06-05 04:52:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 04:52:50,812 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 04:52:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:50,812 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 04:52:50,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 04:52:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:50,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:50,812 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:51,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22296,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:51,013 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1870203905, now seen corresponding path program 459 times [2021-06-05 04:52:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:51,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81736006] [2021-06-05 04:52:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:51,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:51,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81736006] [2021-06-05 04:52:51,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81736006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:51,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662456574] [2021-06-05 04:52:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:52:51,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:51,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:51,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:51,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:51,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:51,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:51,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:51,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:51,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,477 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:52:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,503 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:51,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:51,503 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:51,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662456574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:51,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:51,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374817207] [2021-06-05 04:52:51,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:51,526 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:51,940 INFO L93 Difference]: Finished difference Result 203 states and 425 transitions. [2021-06-05 04:52:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:52:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:51,941 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:52:51,941 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:52:51,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:52:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:52:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 135. [2021-06-05 04:52:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.156716417910448) internal successors, (289), 134 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 289 transitions. [2021-06-05 04:52:51,942 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 289 transitions. Word has length 19 [2021-06-05 04:52:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:51,942 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 289 transitions. [2021-06-05 04:52:51,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 289 transitions. [2021-06-05 04:52:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:51,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:51,943 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:52,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22326,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:52,143 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash 184546371, now seen corresponding path program 460 times [2021-06-05 04:52:52,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:52,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450072284] [2021-06-05 04:52:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:52,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450072284] [2021-06-05 04:52:52,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450072284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182323402] [2021-06-05 04:52:52,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:52,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:52,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:52,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:52,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:52,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:52,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:52,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:52,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:52,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,497 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:52,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:52,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,504 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:52,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182323402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:52,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:52,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329518450] [2021-06-05 04:52:52,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:52,509 INFO L87 Difference]: Start difference. First operand 135 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:52,760 INFO L93 Difference]: Finished difference Result 179 states and 377 transitions. [2021-06-05 04:52:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:52,761 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:52:52,761 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:52:52,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:52:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-06-05 04:52:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 136 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 293 transitions. [2021-06-05 04:52:52,762 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 293 transitions. Word has length 19 [2021-06-05 04:52:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:52,762 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 293 transitions. [2021-06-05 04:52:52,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 293 transitions. [2021-06-05 04:52:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:52,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:52,763 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:52,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22410 [2021-06-05 04:52:52,963 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -829968107, now seen corresponding path program 461 times [2021-06-05 04:52:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:52,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724541795] [2021-06-05 04:52:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:53,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724541795] [2021-06-05 04:52:53,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724541795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654901869] [2021-06-05 04:52:53,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:53,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:52:53,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:53,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:53,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:53,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:53,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:53,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:53,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:53,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:53,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:53,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:53,328 INFO L628 ElimStorePlain]: treesize reduction 45, result has 42.3 percent of original size [2021-06-05 04:52:53,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:53,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:53,353 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:53,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:53,353 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-06-05 04:52:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:53,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654901869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:53,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:53,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284770048] [2021-06-05 04:52:53,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:53,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:53,375 INFO L87 Difference]: Start difference. First operand 137 states and 293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:53,712 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-06-05 04:52:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:52:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:53,713 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:52:53,713 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:52:53,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:52:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:52:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 138. [2021-06-05 04:52:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 04:52:53,714 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 04:52:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:53,714 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 04:52:53,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 04:52:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:53,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:53,715 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:53,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22440 [2021-06-05 04:52:53,915 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1277305830, now seen corresponding path program 462 times [2021-06-05 04:52:53,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:53,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038816015] [2021-06-05 04:52:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:53,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:53,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038816015] [2021-06-05 04:52:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038816015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:53,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881170169] [2021-06-05 04:52:53,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:54,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:54,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:54,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881170169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:54,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:54,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:54,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795550716] [2021-06-05 04:52:54,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:54,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:54,295 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:54,533 INFO L93 Difference]: Finished difference Result 158 states and 336 transitions. [2021-06-05 04:52:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:54,534 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:52:54,534 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:52:54,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:52:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 136. [2021-06-05 04:52:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1555555555555554) internal successors, (291), 135 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 291 transitions. [2021-06-05 04:52:54,535 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 291 transitions. Word has length 19 [2021-06-05 04:52:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:54,535 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 291 transitions. [2021-06-05 04:52:54,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 291 transitions. [2021-06-05 04:52:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:54,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:54,535 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:54,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22476 [2021-06-05 04:52:54,736 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1456497603, now seen corresponding path program 463 times [2021-06-05 04:52:54,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:54,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706638950] [2021-06-05 04:52:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:54,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:54,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706638950] [2021-06-05 04:52:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706638950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:54,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721898809] [2021-06-05 04:52:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:55,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:55,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:55,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,166 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:52:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:55,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:55,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:55,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:55,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:55,372 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:52:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:55,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721898809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:55,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:55,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:55,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740842400] [2021-06-05 04:52:55,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:55,400 INFO L87 Difference]: Start difference. First operand 136 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:55,660 INFO L93 Difference]: Finished difference Result 181 states and 375 transitions. [2021-06-05 04:52:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:55,661 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:52:55,661 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:52:55,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:52:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-06-05 04:52:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1605839416058394) internal successors, (296), 137 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 296 transitions. [2021-06-05 04:52:55,662 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 296 transitions. Word has length 19 [2021-06-05 04:52:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:55,662 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 296 transitions. [2021-06-05 04:52:55,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 296 transitions. [2021-06-05 04:52:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:55,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:55,663 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:55,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22532 [2021-06-05 04:52:55,863 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash -689560508, now seen corresponding path program 464 times [2021-06-05 04:52:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:55,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620886931] [2021-06-05 04:52:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:55,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:55,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620886931] [2021-06-05 04:52:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620886931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:55,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958910120] [2021-06-05 04:52:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:56,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:56,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958910120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:56,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:56,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722600787] [2021-06-05 04:52:56,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:56,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:56,294 INFO L87 Difference]: Start difference. First operand 138 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:56,558 INFO L93 Difference]: Finished difference Result 224 states and 462 transitions. [2021-06-05 04:52:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:52:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:56,559 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:52:56,559 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:52:56,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:52:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 139. [2021-06-05 04:52:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 04:52:56,561 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 19 [2021-06-05 04:52:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:56,561 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 04:52:56,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 04:52:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:56,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:56,561 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:56,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22555,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:56,762 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1224790310, now seen corresponding path program 465 times [2021-06-05 04:52:56,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:56,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976392270] [2021-06-05 04:52:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:56,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:56,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976392270] [2021-06-05 04:52:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976392270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:56,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429524573] [2021-06-05 04:52:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:56,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:52:56,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:56,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:56,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429524573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:57,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619130778] [2021-06-05 04:52:57,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:57,078 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:57,336 INFO L93 Difference]: Finished difference Result 177 states and 375 transitions. [2021-06-05 04:52:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:57,336 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:52:57,336 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:52:57,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:52:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2021-06-05 04:52:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-06-05 04:52:57,338 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-06-05 04:52:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:57,338 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-06-05 04:52:57,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-06-05 04:52:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:57,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:57,338 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:57,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22610 [2021-06-05 04:52:57,539 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510845, now seen corresponding path program 466 times [2021-06-05 04:52:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:57,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857789605] [2021-06-05 04:52:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:57,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857789605] [2021-06-05 04:52:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857789605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387708216] [2021-06-05 04:52:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:57,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387708216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:57,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:57,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667064951] [2021-06-05 04:52:57,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:57,918 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:58,180 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 04:52:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:58,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:58,181 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:52:58,181 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:52:58,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:52:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2021-06-05 04:52:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 133 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 287 transitions. [2021-06-05 04:52:58,182 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 287 transitions. Word has length 19 [2021-06-05 04:52:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:58,182 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 287 transitions. [2021-06-05 04:52:58,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 287 transitions. [2021-06-05 04:52:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:58,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:58,182 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:58,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22630,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:58,383 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1927882259, now seen corresponding path program 467 times [2021-06-05 04:52:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:58,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308336543] [2021-06-05 04:52:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:58,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:58,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308336543] [2021-06-05 04:52:58,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308336543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324918050] [2021-06-05 04:52:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:58,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:58,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:58,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:58,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:58,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:58,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,754 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:52:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:58,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:58,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:52:58,761 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:52:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324918050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:58,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:58,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362093698] [2021-06-05 04:52:58,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:58,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:58,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:58,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:58,766 INFO L87 Difference]: Start difference. First operand 134 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:59,022 INFO L93 Difference]: Finished difference Result 177 states and 373 transitions. [2021-06-05 04:52:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:59,023 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:52:59,023 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:52:59,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:52:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2021-06-05 04:52:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 133 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 287 transitions. [2021-06-05 04:52:59,024 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 287 transitions. Word has length 19 [2021-06-05 04:52:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:59,024 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 287 transitions. [2021-06-05 04:52:59,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 287 transitions. [2021-06-05 04:52:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:59,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:59,025 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22652 [2021-06-05 04:52:59,225 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1352570559, now seen corresponding path program 468 times [2021-06-05 04:52:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316063480] [2021-06-05 04:52:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:59,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:59,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316063480] [2021-06-05 04:52:59,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316063480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:59,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055042056] [2021-06-05 04:52:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:59,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:52:59,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:52:59,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:59,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:59,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:59,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:59,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:59,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:52:59,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:59,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:59,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:59,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:52:59,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:59,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,654 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 04:52:59,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:59,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:59,679 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:52:59,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:59,679 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 04:52:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:59,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055042056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:59,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:59,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:52:59,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626339597] [2021-06-05 04:52:59,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:59,701 INFO L87 Difference]: Start difference. First operand 134 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:59,928 INFO L93 Difference]: Finished difference Result 191 states and 401 transitions. [2021-06-05 04:52:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:52:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:52:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:59,929 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:52:59,929 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:52:59,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:52:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 135. [2021-06-05 04:52:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.156716417910448) internal successors, (289), 134 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 289 transitions. [2021-06-05 04:52:59,930 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 289 transitions. Word has length 19 [2021-06-05 04:52:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:59,930 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 289 transitions. [2021-06-05 04:52:59,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 289 transitions. [2021-06-05 04:52:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:52:59,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:59,931 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:00,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22694,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:00,131 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash 905232836, now seen corresponding path program 469 times [2021-06-05 04:53:00,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:00,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919525001] [2021-06-05 04:53:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:00,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919525001] [2021-06-05 04:53:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919525001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067039183] [2021-06-05 04:53:00,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:00,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:00,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067039183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:00,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:00,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:00,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271177848] [2021-06-05 04:53:00,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:00,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:00,507 INFO L87 Difference]: Start difference. First operand 135 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:00,684 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-06-05 04:53:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:00,685 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:53:00,685 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:53:00,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:53:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 133. [2021-06-05 04:53:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-06-05 04:53:00,686 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 19 [2021-06-05 04:53:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:00,686 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-06-05 04:53:00,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-06-05 04:53:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:00,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:00,686 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:00,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22756 [2021-06-05 04:53:00,887 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -655931027, now seen corresponding path program 470 times [2021-06-05 04:53:00,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:00,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85670258] [2021-06-05 04:53:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:00,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:00,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85670258] [2021-06-05 04:53:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85670258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:00,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626192584] [2021-06-05 04:53:00,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:01,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:01,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:01,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:01,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:01,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,313 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 04:53:01,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:01,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:01,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:01,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:01,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:01,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:01,468 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:01,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:01,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:01,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:01,518 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:01,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626192584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:01,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:01,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:01,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221672580] [2021-06-05 04:53:01,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:01,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:01,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:01,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:01,546 INFO L87 Difference]: Start difference. First operand 133 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:01,774 INFO L93 Difference]: Finished difference Result 176 states and 365 transitions. [2021-06-05 04:53:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:01,775 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:53:01,775 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:53:01,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:53:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2021-06-05 04:53:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 04:53:01,776 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 04:53:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:01,776 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 04:53:01,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 04:53:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:01,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:01,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:01,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22813 [2021-06-05 04:53:01,977 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1492978158, now seen corresponding path program 471 times [2021-06-05 04:53:01,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:01,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492427859] [2021-06-05 04:53:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:02,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:02,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492427859] [2021-06-05 04:53:02,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492427859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:02,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663624312] [2021-06-05 04:53:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:02,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:53:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:02,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:02,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663624312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:02,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:02,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:02,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318870606] [2021-06-05 04:53:02,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:02,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:02,359 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:02,687 INFO L93 Difference]: Finished difference Result 215 states and 442 transitions. [2021-06-05 04:53:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:02,687 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:53:02,687 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:53:02,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:53:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:53:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 136. [2021-06-05 04:53:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-06-05 04:53:02,689 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 19 [2021-06-05 04:53:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:02,689 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-06-05 04:53:02,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-06-05 04:53:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:02,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:02,689 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:02,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22836,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:02,890 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash 957748356, now seen corresponding path program 472 times [2021-06-05 04:53:02,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:02,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164479129] [2021-06-05 04:53:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:02,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164479129] [2021-06-05 04:53:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164479129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045255663] [2021-06-05 04:53:02,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:03,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:03,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045255663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:03,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:03,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:03,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203345677] [2021-06-05 04:53:03,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:03,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:03,191 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:03,443 INFO L93 Difference]: Finished difference Result 173 states and 367 transitions. [2021-06-05 04:53:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:03,444 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:53:03,444 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:53:03,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:53:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-06-05 04:53:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 04:53:03,445 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 04:53:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:03,445 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 04:53:03,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 04:53:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:03,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:03,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:03,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22881,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:03,646 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:03,646 INFO L82 PathProgramCache]: Analyzing trace with hash 593027821, now seen corresponding path program 473 times [2021-06-05 04:53:03,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:03,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759759830] [2021-06-05 04:53:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:03,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:03,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759759830] [2021-06-05 04:53:03,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759759830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:03,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411340540] [2021-06-05 04:53:03,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:03,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411340540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:04,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:04,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:04,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525112176] [2021-06-05 04:53:04,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:04,014 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:04,207 INFO L93 Difference]: Finished difference Result 149 states and 314 transitions. [2021-06-05 04:53:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:04,207 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:53:04,208 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:53:04,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:53:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-06-05 04:53:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-06-05 04:53:04,209 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-06-05 04:53:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:04,209 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-06-05 04:53:04,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-06-05 04:53:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:04,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:04,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:04,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22902 [2021-06-05 04:53:04,432 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash 384304771, now seen corresponding path program 474 times [2021-06-05 04:53:04,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:04,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047478308] [2021-06-05 04:53:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:04,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:04,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047478308] [2021-06-05 04:53:04,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047478308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:04,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715254108] [2021-06-05 04:53:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:04,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:04,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:04,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:04,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,898 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 04:53:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:04,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:04,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:04,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:04,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:05,024 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:05,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:05,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:05,101 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:05,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715254108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:05,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:05,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:05,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916827204] [2021-06-05 04:53:05,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:05,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:05,128 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:05,348 INFO L93 Difference]: Finished difference Result 182 states and 378 transitions. [2021-06-05 04:53:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:05,349 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:53:05,349 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:53:05,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:53:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-06-05 04:53:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.171641791044776) internal successors, (291), 134 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 291 transitions. [2021-06-05 04:53:05,350 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 291 transitions. Word has length 19 [2021-06-05 04:53:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:05,350 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 291 transitions. [2021-06-05 04:53:05,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 291 transitions. [2021-06-05 04:53:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:05,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:05,350 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:05,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22923,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:05,551 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1761753340, now seen corresponding path program 475 times [2021-06-05 04:53:05,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:05,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811305688] [2021-06-05 04:53:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:05,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:05,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811305688] [2021-06-05 04:53:05,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811305688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:05,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185614429] [2021-06-05 04:53:05,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185614429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:06,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:06,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:06,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257587106] [2021-06-05 04:53:06,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:06,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:06,002 INFO L87 Difference]: Start difference. First operand 135 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:06,532 INFO L93 Difference]: Finished difference Result 240 states and 495 transitions. [2021-06-05 04:53:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:53:06,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:06,533 INFO L225 Difference]: With dead ends: 240 [2021-06-05 04:53:06,533 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 04:53:06,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:53:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 04:53:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 137. [2021-06-05 04:53:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-05 04:53:06,535 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 19 [2021-06-05 04:53:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:06,535 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-05 04:53:06,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-05 04:53:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:06,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:06,535 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:06,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22946,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:06,736 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1997984154, now seen corresponding path program 476 times [2021-06-05 04:53:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:06,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547545278] [2021-06-05 04:53:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:06,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547545278] [2021-06-05 04:53:06,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547545278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565239632] [2021-06-05 04:53:06,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:06,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:06,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:06,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:07,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565239632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:07,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:07,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23666040] [2021-06-05 04:53:07,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:07,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:07,071 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:07,444 INFO L93 Difference]: Finished difference Result 201 states and 426 transitions. [2021-06-05 04:53:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:07,445 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:53:07,445 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:53:07,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:53:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:53:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2021-06-05 04:53:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-05 04:53:07,446 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 19 [2021-06-05 04:53:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:07,446 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-05 04:53:07,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-05 04:53:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:07,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:07,447 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:07,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23006,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:07,647 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1633263619, now seen corresponding path program 477 times [2021-06-05 04:53:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:07,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738610982] [2021-06-05 04:53:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:07,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738610982] [2021-06-05 04:53:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738610982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700489265] [2021-06-05 04:53:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:07,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:07,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700489265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:08,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:08,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359906366] [2021-06-05 04:53:08,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:08,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:08,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:08,057 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:08,304 INFO L93 Difference]: Finished difference Result 163 states and 345 transitions. [2021-06-05 04:53:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:08,305 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:53:08,305 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:53:08,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:53:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2021-06-05 04:53:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1925925925925926) internal successors, (296), 135 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 296 transitions. [2021-06-05 04:53:08,307 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 296 transitions. Word has length 19 [2021-06-05 04:53:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:08,307 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 296 transitions. [2021-06-05 04:53:08,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 296 transitions. [2021-06-05 04:53:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:08,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:08,307 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:08,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23035 [2021-06-05 04:53:08,521 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1709237820, now seen corresponding path program 478 times [2021-06-05 04:53:08,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:08,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665668979] [2021-06-05 04:53:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:08,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665668979] [2021-06-05 04:53:08,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665668979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501045847] [2021-06-05 04:53:08,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:08,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501045847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475873881] [2021-06-05 04:53:08,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:08,843 INFO L87 Difference]: Start difference. First operand 136 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:09,049 INFO L93 Difference]: Finished difference Result 179 states and 380 transitions. [2021-06-05 04:53:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:09,049 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:53:09,049 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:53:09,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:53:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 133. [2021-06-05 04:53:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-06-05 04:53:09,051 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-06-05 04:53:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:09,051 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-06-05 04:53:09,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-06-05 04:53:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:09,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:09,051 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:09,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23057 [2021-06-05 04:53:09,251 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash 620571087, now seen corresponding path program 479 times [2021-06-05 04:53:09,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:09,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600035176] [2021-06-05 04:53:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:09,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600035176] [2021-06-05 04:53:09,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600035176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2318505] [2021-06-05 04:53:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:09,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:09,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2318505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:09,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:09,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:53:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477793507] [2021-06-05 04:53:09,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:09,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:09,627 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:09,851 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-06-05 04:53:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:09,852 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:53:09,852 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:53:09,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:53:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2021-06-05 04:53:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:53:09,853 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:53:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:09,853 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:53:09,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:53:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:09,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:09,853 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:10,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23077,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:10,054 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1306306947, now seen corresponding path program 480 times [2021-06-05 04:53:10,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:10,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244897364] [2021-06-05 04:53:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:10,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244897364] [2021-06-05 04:53:10,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244897364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005696419] [2021-06-05 04:53:10,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:10,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:53:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:10,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:10,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:10,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:10,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:10,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:10,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,401 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 04:53:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:10,403 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:10,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,407 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 04:53:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005696419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:10,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:10,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770983831] [2021-06-05 04:53:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:10,412 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:10,673 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2021-06-05 04:53:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:10,673 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:53:10,673 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:53:10,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:53:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2021-06-05 04:53:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:53:10,675 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:53:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:10,675 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:53:10,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:53:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:10,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:10,678 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:10,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:10,893 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash 291792469, now seen corresponding path program 481 times [2021-06-05 04:53:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:10,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367471850] [2021-06-05 04:53:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:10,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:10,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367471850] [2021-06-05 04:53:10,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367471850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:10,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528002321] [2021-06-05 04:53:10,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:11,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:11,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:11,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:11,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:11,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:11,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:11,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:11,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:11,289 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:53:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:11,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:11,314 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:53:11,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:11,315 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:53:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528002321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:11,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:11,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:11,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781836754] [2021-06-05 04:53:11,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:11,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:11,336 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:11,552 INFO L93 Difference]: Finished difference Result 186 states and 391 transitions. [2021-06-05 04:53:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:11,553 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:53:11,553 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:53:11,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:53:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 130. [2021-06-05 04:53:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:53:11,554 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:53:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:11,554 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:53:11,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:53:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:11,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:11,569 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:11,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23127 [2021-06-05 04:53:11,769 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:11,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1543175134, now seen corresponding path program 482 times [2021-06-05 04:53:11,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:11,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367198367] [2021-06-05 04:53:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:11,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:11,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367198367] [2021-06-05 04:53:11,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367198367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:11,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986895443] [2021-06-05 04:53:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:11,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:11,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:11,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:11,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:12,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986895443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:12,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:12,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:12,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471692172] [2021-06-05 04:53:12,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:12,123 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:12,320 INFO L93 Difference]: Finished difference Result 152 states and 323 transitions. [2021-06-05 04:53:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:53:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:12,321 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:53:12,321 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:53:12,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:53:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2021-06-05 04:53:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-06-05 04:53:12,322 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-06-05 04:53:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:12,322 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-06-05 04:53:12,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-06-05 04:53:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:12,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:12,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:12,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23174,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:12,523 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1716709117, now seen corresponding path program 483 times [2021-06-05 04:53:12,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325206427] [2021-06-05 04:53:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325206427] [2021-06-05 04:53:12,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325206427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542022316] [2021-06-05 04:53:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:12,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:12,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:12,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:12,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,921 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-06-05 04:53:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:12,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:12,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:12,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:12,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:12,983 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:53:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:13,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542022316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:13,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330625666] [2021-06-05 04:53:13,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:13,010 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:13,333 INFO L93 Difference]: Finished difference Result 184 states and 372 transitions. [2021-06-05 04:53:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:13,334 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:53:13,334 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:53:13,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:53:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:53:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 129. [2021-06-05 04:53:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-06-05 04:53:13,335 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-06-05 04:53:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:13,335 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-06-05 04:53:13,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-06-05 04:53:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:13,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:13,336 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:13,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23211 [2021-06-05 04:53:13,536 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash 432200068, now seen corresponding path program 484 times [2021-06-05 04:53:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:13,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221896699] [2021-06-05 04:53:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:13,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221896699] [2021-06-05 04:53:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221896699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594881693] [2021-06-05 04:53:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:13,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:13,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:14,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594881693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:14,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:14,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690693545] [2021-06-05 04:53:14,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:14,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:14,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:14,021 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:14,461 INFO L93 Difference]: Finished difference Result 222 states and 447 transitions. [2021-06-05 04:53:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:14,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:14,462 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:53:14,462 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 04:53:14,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:53:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 04:53:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 130. [2021-06-05 04:53:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 04:53:14,463 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 04:53:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:14,463 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 04:53:14,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 04:53:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:14,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:14,463 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23231,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:14,664 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -103029734, now seen corresponding path program 485 times [2021-06-05 04:53:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:14,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640248136] [2021-06-05 04:53:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:14,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:14,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640248136] [2021-06-05 04:53:14,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640248136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:14,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039822396] [2021-06-05 04:53:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:14,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:53:14,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039822396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:14,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:14,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233989025] [2021-06-05 04:53:14,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:14,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:14,982 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:15,278 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 04:53:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:15,278 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:53:15,278 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:53:15,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:53:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:53:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2021-06-05 04:53:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.15748031496063) internal successors, (274), 127 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 274 transitions. [2021-06-05 04:53:15,280 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 274 transitions. Word has length 19 [2021-06-05 04:53:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:15,280 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 274 transitions. [2021-06-05 04:53:15,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 274 transitions. [2021-06-05 04:53:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:15,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:15,281 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:15,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23314 [2021-06-05 04:53:15,498 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash -467750269, now seen corresponding path program 486 times [2021-06-05 04:53:15,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:15,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721809296] [2021-06-05 04:53:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:15,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:15,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721809296] [2021-06-05 04:53:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721809296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398212892] [2021-06-05 04:53:15,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:15,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398212892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:15,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666447578] [2021-06-05 04:53:15,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:15,867 INFO L87 Difference]: Start difference. First operand 128 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:16,101 INFO L93 Difference]: Finished difference Result 144 states and 302 transitions. [2021-06-05 04:53:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:53:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:16,101 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:53:16,101 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:53:16,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:53:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 126. [2021-06-05 04:53:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.152) internal successors, (269), 125 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 269 transitions. [2021-06-05 04:53:16,103 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 269 transitions. Word has length 19 [2021-06-05 04:53:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:16,103 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 269 transitions. [2021-06-05 04:53:16,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 269 transitions. [2021-06-05 04:53:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:16,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:16,103 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:16,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23331,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:16,304 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -676473319, now seen corresponding path program 487 times [2021-06-05 04:53:16,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:16,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237801137] [2021-06-05 04:53:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:16,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237801137] [2021-06-05 04:53:16,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237801137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202859262] [2021-06-05 04:53:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:16,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:16,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:16,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,778 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 04:53:16,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:16,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:16,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:16,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:16,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:16,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:16,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:16,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:16,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:16,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:16,982 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:17,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202859262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:17,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:17,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:17,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625140753] [2021-06-05 04:53:17,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:17,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:17,011 INFO L87 Difference]: Start difference. First operand 126 states and 269 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:17,304 INFO L93 Difference]: Finished difference Result 162 states and 335 transitions. [2021-06-05 04:53:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:17,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:17,305 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:53:17,305 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:53:17,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:53:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2021-06-05 04:53:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-06-05 04:53:17,306 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-06-05 04:53:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:17,306 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-06-05 04:53:17,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-06-05 04:53:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:17,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:17,307 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:17,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23351,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:17,507 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1472435866, now seen corresponding path program 488 times [2021-06-05 04:53:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:17,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423705583] [2021-06-05 04:53:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:17,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423705583] [2021-06-05 04:53:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423705583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936147305] [2021-06-05 04:53:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:17,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:17,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:17,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:17,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936147305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:17,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:17,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254267455] [2021-06-05 04:53:17,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:17,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:17,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:17,922 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:18,378 INFO L93 Difference]: Finished difference Result 215 states and 431 transitions. [2021-06-05 04:53:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:18,379 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:53:18,379 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:53:18,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:53:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:53:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 131. [2021-06-05 04:53:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 04:53:18,381 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 04:53:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:18,381 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 04:53:18,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 04:53:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:18,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:18,381 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:18,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23372,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:18,585 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash 937206064, now seen corresponding path program 489 times [2021-06-05 04:53:18,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:18,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18622562] [2021-06-05 04:53:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:18,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18622562] [2021-06-05 04:53:18,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18622562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490464580] [2021-06-05 04:53:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:18,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490464580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:18,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:18,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702838782] [2021-06-05 04:53:18,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:18,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:18,917 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:19,174 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-06-05 04:53:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:53:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:19,174 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:53:19,174 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:53:19,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:53:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 131. [2021-06-05 04:53:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 04:53:19,176 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 04:53:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:19,176 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 04:53:19,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 04:53:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:19,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:19,176 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23424 [2021-06-05 04:53:19,377 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 572485529, now seen corresponding path program 490 times [2021-06-05 04:53:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384910021] [2021-06-05 04:53:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:19,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:19,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384910021] [2021-06-05 04:53:19,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384910021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:19,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782465931] [2021-06-05 04:53:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:19,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:19,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:19,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782465931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:19,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:19,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:19,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719938359] [2021-06-05 04:53:19,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:19,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:19,782 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:20,067 INFO L93 Difference]: Finished difference Result 150 states and 318 transitions. [2021-06-05 04:53:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:20,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:20,068 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:53:20,068 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:53:20,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:53:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2021-06-05 04:53:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 04:53:20,069 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 04:53:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:20,069 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 04:53:20,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 04:53:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:20,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:20,069 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:20,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23440,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:20,270 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:20,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1524951386, now seen corresponding path program 491 times [2021-06-05 04:53:20,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:20,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252530506] [2021-06-05 04:53:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:20,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252530506] [2021-06-05 04:53:20,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252530506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580802671] [2021-06-05 04:53:20,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:20,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:20,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580802671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:20,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:20,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:20,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922580590] [2021-06-05 04:53:20,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:20,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:20,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:20,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:20,563 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:20,776 INFO L93 Difference]: Finished difference Result 160 states and 337 transitions. [2021-06-05 04:53:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:20,776 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:53:20,776 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:53:20,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:53:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-06-05 04:53:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 04:53:20,778 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 04:53:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:20,778 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 04:53:20,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 04:53:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:20,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:20,778 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:20,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23461,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:20,978 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1506065347, now seen corresponding path program 492 times [2021-06-05 04:53:20,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:20,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115229222] [2021-06-05 04:53:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:21,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:21,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115229222] [2021-06-05 04:53:21,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115229222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:21,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339932673] [2021-06-05 04:53:21,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:21,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:21,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:21,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:21,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:21,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:21,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,508 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-06-05 04:53:21,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:21,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:21,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:21,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:21,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:21,635 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:21,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:21,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:21,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:21,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:21,711 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:21,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339932673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:21,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:21,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852923408] [2021-06-05 04:53:21,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:21,740 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:22,248 INFO L93 Difference]: Finished difference Result 183 states and 376 transitions. [2021-06-05 04:53:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:53:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:22,249 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:53:22,249 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:53:22,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:53:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:53:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-06-05 04:53:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-06-05 04:53:22,250 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-06-05 04:53:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:22,250 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-06-05 04:53:22,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-06-05 04:53:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:22,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:22,250 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:22,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23481,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:22,451 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:22,451 INFO L82 PathProgramCache]: Analyzing trace with hash -639992764, now seen corresponding path program 493 times [2021-06-05 04:53:22,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:22,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462987161] [2021-06-05 04:53:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:22,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:22,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462987161] [2021-06-05 04:53:22,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462987161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:22,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907080249] [2021-06-05 04:53:22,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:22,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:22,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907080249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:22,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:22,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:22,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310183708] [2021-06-05 04:53:22,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:22,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:22,912 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:23,435 INFO L93 Difference]: Finished difference Result 208 states and 417 transitions. [2021-06-05 04:53:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:23,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:23,435 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:53:23,435 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:53:23,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:53:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:53:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 132. [2021-06-05 04:53:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2061068702290076) internal successors, (289), 131 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 289 transitions. [2021-06-05 04:53:23,437 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 289 transitions. Word has length 19 [2021-06-05 04:53:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:23,437 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 289 transitions. [2021-06-05 04:53:23,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 289 transitions. [2021-06-05 04:53:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:23,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:23,437 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:23,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23503 [2021-06-05 04:53:23,638 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1175222566, now seen corresponding path program 494 times [2021-06-05 04:53:23,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:23,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022396849] [2021-06-05 04:53:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:23,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022396849] [2021-06-05 04:53:23,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022396849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849205133] [2021-06-05 04:53:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:23,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:23,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:23,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:23,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849205133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:23,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:23,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123762194] [2021-06-05 04:53:23,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:23,978 INFO L87 Difference]: Start difference. First operand 132 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:24,379 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-06-05 04:53:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:24,380 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:53:24,380 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:53:24,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:53:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2021-06-05 04:53:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2061068702290076) internal successors, (289), 131 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 289 transitions. [2021-06-05 04:53:24,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 289 transitions. Word has length 19 [2021-06-05 04:53:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:24,382 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 289 transitions. [2021-06-05 04:53:24,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 289 transitions. [2021-06-05 04:53:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:24,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:24,382 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:24,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23560,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:24,582 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1539943101, now seen corresponding path program 495 times [2021-06-05 04:53:24,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:24,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509550334] [2021-06-05 04:53:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:24,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509550334] [2021-06-05 04:53:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509550334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478503921] [2021-06-05 04:53:24,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:24,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:25,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478503921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:25,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:25,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:25,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179575445] [2021-06-05 04:53:25,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:25,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:25,064 INFO L87 Difference]: Start difference. First operand 132 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:25,487 INFO L93 Difference]: Finished difference Result 171 states and 351 transitions. [2021-06-05 04:53:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:53:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:25,488 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:53:25,488 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:53:25,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:53:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 131. [2021-06-05 04:53:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 04:53:25,489 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 04:53:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:25,489 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 04:53:25,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 04:53:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:25,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:25,489 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:25,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23577 [2021-06-05 04:53:25,690 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -587477244, now seen corresponding path program 496 times [2021-06-05 04:53:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:25,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62736603] [2021-06-05 04:53:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:25,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62736603] [2021-06-05 04:53:25,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62736603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142595461] [2021-06-05 04:53:25,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:25,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142595461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:26,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:26,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:53:26,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679944715] [2021-06-05 04:53:26,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:26,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:26,020 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:26,280 INFO L93 Difference]: Finished difference Result 161 states and 341 transitions. [2021-06-05 04:53:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:26,280 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:53:26,280 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:53:26,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:53:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 130. [2021-06-05 04:53:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-06-05 04:53:26,282 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 19 [2021-06-05 04:53:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:26,282 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-06-05 04:53:26,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-06-05 04:53:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:26,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:26,282 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:26,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23605 [2021-06-05 04:53:26,482 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash 452758554, now seen corresponding path program 497 times [2021-06-05 04:53:26,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:26,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685330406] [2021-06-05 04:53:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:26,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685330406] [2021-06-05 04:53:26,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685330406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824263828] [2021-06-05 04:53:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:26,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:53:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:26,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:26,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824263828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:26,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:26,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:26,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216048610] [2021-06-05 04:53:26,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:26,774 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:26,960 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2021-06-05 04:53:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:26,960 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:53:26,960 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:53:26,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:53:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 126. [2021-06-05 04:53:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.16) internal successors, (270), 125 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 270 transitions. [2021-06-05 04:53:26,962 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 270 transitions. Word has length 19 [2021-06-05 04:53:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:26,962 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 270 transitions. [2021-06-05 04:53:26,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 270 transitions. [2021-06-05 04:53:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:26,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:26,962 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:27,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23622,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:27,162 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash 413634243, now seen corresponding path program 498 times [2021-06-05 04:53:27,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:27,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390180598] [2021-06-05 04:53:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:27,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:27,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390180598] [2021-06-05 04:53:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390180598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101142641] [2021-06-05 04:53:27,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:27,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:27,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:27,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101142641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:27,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213756844] [2021-06-05 04:53:27,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:27,497 INFO L87 Difference]: Start difference. First operand 126 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:27,703 INFO L93 Difference]: Finished difference Result 134 states and 280 transitions. [2021-06-05 04:53:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:27,704 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:53:27,704 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:53:27,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:53:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-06-05 04:53:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1557377049180326) internal successors, (263), 122 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 263 transitions. [2021-06-05 04:53:27,705 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 263 transitions. Word has length 19 [2021-06-05 04:53:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:27,705 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 263 transitions. [2021-06-05 04:53:27,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 263 transitions. [2021-06-05 04:53:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:27,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:27,705 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:27,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23626,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:27,906 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1781789199, now seen corresponding path program 499 times [2021-06-05 04:53:27,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:27,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785349163] [2021-06-05 04:53:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:27,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785349163] [2021-06-05 04:53:27,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785349163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482938324] [2021-06-05 04:53:27,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:28,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:28,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:28,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,230 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 04:53:28,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:28,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 04:53:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482938324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:28,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:28,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288951642] [2021-06-05 04:53:28,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:28,242 INFO L87 Difference]: Start difference. First operand 123 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:28,520 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2021-06-05 04:53:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:28,520 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:53:28,520 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:53:28,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:53:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-06-05 04:53:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1557377049180326) internal successors, (263), 122 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 263 transitions. [2021-06-05 04:53:28,522 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 263 transitions. Word has length 19 [2021-06-05 04:53:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:28,522 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 263 transitions. [2021-06-05 04:53:28,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 263 transitions. [2021-06-05 04:53:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:28,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:28,522 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:28,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23637 [2021-06-05 04:53:28,723 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1498663619, now seen corresponding path program 500 times [2021-06-05 04:53:28,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356842129] [2021-06-05 04:53:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:28,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356842129] [2021-06-05 04:53:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356842129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7689906] [2021-06-05 04:53:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:28,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:28,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:28,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:29,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:29,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:29,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:29,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,110 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 04:53:29,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:29,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,135 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 04:53:29,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:29,136 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 04:53:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:29,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7689906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:29,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:29,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:29,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599104956] [2021-06-05 04:53:29,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:29,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:29,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:29,164 INFO L87 Difference]: Start difference. First operand 123 states and 263 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:29,429 INFO L93 Difference]: Finished difference Result 179 states and 375 transitions. [2021-06-05 04:53:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:29,429 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:53:29,429 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:53:29,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:53:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 121. [2021-06-05 04:53:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 04:53:29,431 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 19 [2021-06-05 04:53:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:29,431 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 04:53:29,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 04:53:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:29,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:29,431 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:29,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23661,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:29,631 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -509837967, now seen corresponding path program 501 times [2021-06-05 04:53:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:29,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018070769] [2021-06-05 04:53:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:29,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018070769] [2021-06-05 04:53:29,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018070769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141755906] [2021-06-05 04:53:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:29,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:29,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:29,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,041 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:53:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:30,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,137 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:30,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:30,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:30,243 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:30,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141755906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:30,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:30,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:30,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937325336] [2021-06-05 04:53:30,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:30,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:30,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:30,269 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:30,538 INFO L93 Difference]: Finished difference Result 166 states and 342 transitions. [2021-06-05 04:53:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:30,538 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:53:30,538 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:53:30,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:53:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 121. [2021-06-05 04:53:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 04:53:30,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 19 [2021-06-05 04:53:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:30,539 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 04:53:30,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 04:53:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:30,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:30,540 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:30,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23710 [2021-06-05 04:53:30,740 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1639071218, now seen corresponding path program 502 times [2021-06-05 04:53:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143528087] [2021-06-05 04:53:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:30,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:30,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143528087] [2021-06-05 04:53:30,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143528087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:30,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883611582] [2021-06-05 04:53:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:30,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:30,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:31,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883611582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:31,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:31,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:31,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995674186] [2021-06-05 04:53:31,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:31,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:31,169 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:31,626 INFO L93 Difference]: Finished difference Result 218 states and 438 transitions. [2021-06-05 04:53:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:53:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:31,626 INFO L225 Difference]: With dead ends: 218 [2021-06-05 04:53:31,626 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:53:31,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:53:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:53:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2021-06-05 04:53:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1818181818181817) internal successors, (264), 121 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 264 transitions. [2021-06-05 04:53:31,627 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 264 transitions. Word has length 19 [2021-06-05 04:53:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 264 transitions. [2021-06-05 04:53:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 264 transitions. [2021-06-05 04:53:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:31,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:31,628 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:31,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23731 [2021-06-05 04:53:31,828 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1103841416, now seen corresponding path program 503 times [2021-06-05 04:53:31,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:31,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036257841] [2021-06-05 04:53:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:31,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036257841] [2021-06-05 04:53:31,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036257841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434820210] [2021-06-05 04:53:31,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:32,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:53:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:32,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:32,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:32,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434820210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:32,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:32,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:32,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60362306] [2021-06-05 04:53:32,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:32,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:32,151 INFO L87 Difference]: Start difference. First operand 122 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:32,519 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-06-05 04:53:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:53:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:32,519 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:53:32,519 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:53:32,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:53:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:53:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2021-06-05 04:53:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 257 transitions. [2021-06-05 04:53:32,521 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 257 transitions. Word has length 19 [2021-06-05 04:53:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:32,521 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 257 transitions. [2021-06-05 04:53:32,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 257 transitions. [2021-06-05 04:53:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:32,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:32,521 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:32,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23795 [2021-06-05 04:53:32,721 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash 739120881, now seen corresponding path program 504 times [2021-06-05 04:53:32,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:32,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106517916] [2021-06-05 04:53:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:32,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:32,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106517916] [2021-06-05 04:53:32,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106517916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:32,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389520195] [2021-06-05 04:53:32,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:32,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:32,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:33,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389520195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:33,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:33,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:33,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022158502] [2021-06-05 04:53:33,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:33,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:33,099 INFO L87 Difference]: Start difference. First operand 120 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:33,349 INFO L93 Difference]: Finished difference Result 137 states and 287 transitions. [2021-06-05 04:53:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:33,349 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:53:33,349 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:53:33,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:53:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 118. [2021-06-05 04:53:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 04:53:33,351 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 19 [2021-06-05 04:53:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:33,351 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 04:53:33,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 04:53:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:33,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:33,351 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:33,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23812 [2021-06-05 04:53:33,551 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:33,552 INFO L82 PathProgramCache]: Analyzing trace with hash 530397831, now seen corresponding path program 505 times [2021-06-05 04:53:33,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:33,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838174450] [2021-06-05 04:53:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:33,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:33,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838174450] [2021-06-05 04:53:33,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838174450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:33,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905083304] [2021-06-05 04:53:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:33,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:33,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:53:33,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,968 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-06-05 04:53:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:33,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:33,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:33,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:34,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:34,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:34,030 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 04:53:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:34,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905083304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:34,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:34,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:34,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116783803] [2021-06-05 04:53:34,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:34,058 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:34,408 INFO L93 Difference]: Finished difference Result 158 states and 325 transitions. [2021-06-05 04:53:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:34,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:34,409 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:53:34,409 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:53:34,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:53:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 118. [2021-06-05 04:53:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 04:53:34,410 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 19 [2021-06-05 04:53:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:34,410 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 04:53:34,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 04:53:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:34,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:34,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:34,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23840 [2021-06-05 04:53:34,611 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1615660280, now seen corresponding path program 506 times [2021-06-05 04:53:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:34,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990770373] [2021-06-05 04:53:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:34,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:34,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990770373] [2021-06-05 04:53:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990770373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:34,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238742992] [2021-06-05 04:53:34,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:34,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:34,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:35,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238742992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:35,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:35,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538561050] [2021-06-05 04:53:35,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:35,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:35,001 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:35,551 INFO L93 Difference]: Finished difference Result 211 states and 421 transitions. [2021-06-05 04:53:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:35,552 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:53:35,552 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:53:35,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:53:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:53:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 120. [2021-06-05 04:53:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 04:53:35,556 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 19 [2021-06-05 04:53:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:35,556 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 04:53:35,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 04:53:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:35,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:35,557 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:35,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23863 [2021-06-05 04:53:35,757 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2144077214, now seen corresponding path program 507 times [2021-06-05 04:53:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:35,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859689202] [2021-06-05 04:53:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:35,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859689202] [2021-06-05 04:53:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859689202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457369772] [2021-06-05 04:53:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:35,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:35,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:35,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:36,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457369772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:36,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:36,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637289139] [2021-06-05 04:53:36,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:36,094 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:36,451 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2021-06-05 04:53:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:53:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:36,451 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:53:36,451 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:53:36,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:53:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:53:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2021-06-05 04:53:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 04:53:36,453 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 19 [2021-06-05 04:53:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:36,453 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 04:53:36,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 04:53:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:36,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:36,453 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:36,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23907,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:36,654 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1779356679, now seen corresponding path program 508 times [2021-06-05 04:53:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:36,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191010988] [2021-06-05 04:53:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:36,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191010988] [2021-06-05 04:53:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191010988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697295954] [2021-06-05 04:53:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:36,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:37,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697295954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:37,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312712260] [2021-06-05 04:53:37,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:37,070 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:37,468 INFO L93 Difference]: Finished difference Result 159 states and 324 transitions. [2021-06-05 04:53:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:53:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:37,469 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:53:37,469 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:53:37,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:53:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 119. [2021-06-05 04:53:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-05 04:53:37,470 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 19 [2021-06-05 04:53:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:37,470 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-05 04:53:37,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-05 04:53:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:37,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:37,471 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:37,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23936 [2021-06-05 04:53:37,671 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1563144760, now seen corresponding path program 509 times [2021-06-05 04:53:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631870616] [2021-06-05 04:53:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:37,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:37,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631870616] [2021-06-05 04:53:37,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631870616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569014351] [2021-06-05 04:53:37,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:37,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569014351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:37,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748522600] [2021-06-05 04:53:37,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:37,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:37,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:37,986 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:38,210 INFO L93 Difference]: Finished difference Result 155 states and 324 transitions. [2021-06-05 04:53:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:38,211 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:53:38,211 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:53:38,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:53:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2021-06-05 04:53:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 04:53:38,212 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 19 [2021-06-05 04:53:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:38,212 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 04:53:38,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 04:53:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:38,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:38,213 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:38,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23957 [2021-06-05 04:53:38,413 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash 766664147, now seen corresponding path program 510 times [2021-06-05 04:53:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:38,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145604016] [2021-06-05 04:53:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:38,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145604016] [2021-06-05 04:53:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145604016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568505460] [2021-06-05 04:53:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:38,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:38,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568505460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:38,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:38,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:38,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437707848] [2021-06-05 04:53:38,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:38,869 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:39,133 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-06-05 04:53:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:39,134 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:53:39,134 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:53:39,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:53:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-06-05 04:53:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1415929203539825) internal successors, (242), 113 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 242 transitions. [2021-06-05 04:53:39,135 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 242 transitions. Word has length 19 [2021-06-05 04:53:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:39,135 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 242 transitions. [2021-06-05 04:53:39,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 242 transitions. [2021-06-05 04:53:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:39,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:39,135 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:39,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23974,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:39,336 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:39,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1582030799, now seen corresponding path program 511 times [2021-06-05 04:53:39,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:39,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421552644] [2021-06-05 04:53:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:39,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:39,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421552644] [2021-06-05 04:53:39,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421552644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:39,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451280774] [2021-06-05 04:53:39,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:39,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:39,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,851 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:53:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:39,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:39,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:39,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:39,950 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:39,978 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:40,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:40,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,035 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:40,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:40,058 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:40,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451280774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:40,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:40,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233629594] [2021-06-05 04:53:40,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:40,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:40,085 INFO L87 Difference]: Start difference. First operand 114 states and 242 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:40,457 INFO L93 Difference]: Finished difference Result 148 states and 294 transitions. [2021-06-05 04:53:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:53:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:40,457 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:53:40,457 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:53:40,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:53:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2021-06-05 04:53:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 04:53:40,458 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 19 [2021-06-05 04:53:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:40,459 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 04:53:40,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 04:53:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:40,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:40,459 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:40,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23995 [2021-06-05 04:53:40,659 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash 566878386, now seen corresponding path program 512 times [2021-06-05 04:53:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:40,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399295555] [2021-06-05 04:53:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:40,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399295555] [2021-06-05 04:53:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399295555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525849627] [2021-06-05 04:53:40,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:40,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:41,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525849627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:41,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:41,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600795304] [2021-06-05 04:53:41,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:41,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:41,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:41,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:41,040 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:41,435 INFO L93 Difference]: Finished difference Result 172 states and 331 transitions. [2021-06-05 04:53:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:53:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:41,435 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:53:41,436 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:53:41,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:53:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2021-06-05 04:53:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 04:53:41,437 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 04:53:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:41,437 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 04:53:41,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 04:53:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:41,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:41,437 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:41,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24016 [2021-06-05 04:53:41,638 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash 31648584, now seen corresponding path program 513 times [2021-06-05 04:53:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:41,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802480218] [2021-06-05 04:53:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:41,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802480218] [2021-06-05 04:53:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802480218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906423412] [2021-06-05 04:53:41,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:41,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906423412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:41,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:41,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626786169] [2021-06-05 04:53:41,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:41,909 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:42,071 INFO L93 Difference]: Finished difference Result 137 states and 279 transitions. [2021-06-05 04:53:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:42,071 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:53:42,072 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:53:42,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:53:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-05 04:53:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 04:53:42,073 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 04:53:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:42,073 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 04:53:42,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 04:53:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:42,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:42,073 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:42,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24052,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:42,274 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash -333071951, now seen corresponding path program 514 times [2021-06-05 04:53:42,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:42,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224383259] [2021-06-05 04:53:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224383259] [2021-06-05 04:53:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224383259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965267212] [2021-06-05 04:53:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:42,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:42,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:42,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965267212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:42,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:42,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:42,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555575778] [2021-06-05 04:53:42,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:42,674 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:43,016 INFO L93 Difference]: Finished difference Result 149 states and 294 transitions. [2021-06-05 04:53:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:53:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:43,016 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:53:43,016 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:53:43,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:53:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 112. [2021-06-05 04:53:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 04:53:43,018 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 04:53:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:43,018 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 04:53:43,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 04:53:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:43,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:43,018 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:43,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24056,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:43,218 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash 619393906, now seen corresponding path program 515 times [2021-06-05 04:53:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:43,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035552033] [2021-06-05 04:53:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:43,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:43,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035552033] [2021-06-05 04:53:43,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035552033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918119557] [2021-06-05 04:53:43,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:43,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:43,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918119557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:43,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:43,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251205442] [2021-06-05 04:53:43,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:43,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:43,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:43,495 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:43,666 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-06-05 04:53:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:43,666 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:53:43,666 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:53:43,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:53:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 04:53:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 04:53:43,667 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 04:53:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:43,667 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 04:53:43,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 04:53:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:43,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:43,668 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:43,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24075,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:43,868 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:43,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:43,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1345764483, now seen corresponding path program 516 times [2021-06-05 04:53:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283634009] [2021-06-05 04:53:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:43,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283634009] [2021-06-05 04:53:43,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283634009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920951400] [2021-06-05 04:53:43,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:44,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920951400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:44,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:44,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563721820] [2021-06-05 04:53:44,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:44,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:44,281 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:44,564 INFO L93 Difference]: Finished difference Result 144 states and 282 transitions. [2021-06-05 04:53:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:44,564 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:53:44,564 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:53:44,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:53:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2021-06-05 04:53:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 04:53:44,566 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 04:53:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:44,566 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 04:53:44,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 04:53:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:44,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:44,566 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:44,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24079,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:44,767 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1659629704, now seen corresponding path program 517 times [2021-06-05 04:53:44,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:44,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494789359] [2021-06-05 04:53:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:44,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:44,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494789359] [2021-06-05 04:53:44,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494789359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:44,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505930486] [2021-06-05 04:53:44,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:45,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505930486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:45,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:53:45,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954915848] [2021-06-05 04:53:45,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:53:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:53:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:53:45,011 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:45,170 INFO L93 Difference]: Finished difference Result 133 states and 269 transitions. [2021-06-05 04:53:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:45,171 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:53:45,171 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:53:45,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:53:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 107. [2021-06-05 04:53:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.056603773584906) internal successors, (218), 106 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 218 transitions. [2021-06-05 04:53:45,172 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 218 transitions. Word has length 19 [2021-06-05 04:53:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:45,172 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 218 transitions. [2021-06-05 04:53:45,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 218 transitions. [2021-06-05 04:53:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:45,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:45,172 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:45,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24099,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:45,373 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1620505393, now seen corresponding path program 518 times [2021-06-05 04:53:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:45,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444271327] [2021-06-05 04:53:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:45,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444271327] [2021-06-05 04:53:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444271327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936238618] [2021-06-05 04:53:45,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:45,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936238618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:45,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:45,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056982699] [2021-06-05 04:53:45,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:45,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:45,692 INFO L87 Difference]: Start difference. First operand 107 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:45,856 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-06-05 04:53:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:45,856 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:53:45,856 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:53:45,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:53:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-06-05 04:53:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 04:53:45,857 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 04:53:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:45,857 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 04:53:45,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 04:53:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:45,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:45,858 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:46,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24103 [2021-06-05 04:53:46,058 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash -470873217, now seen corresponding path program 519 times [2021-06-05 04:53:46,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:46,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480944608] [2021-06-05 04:53:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:46,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:46,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480944608] [2021-06-05 04:53:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480944608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:46,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064485731] [2021-06-05 04:53:46,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:46,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:46,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:53:46,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,613 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 04:53:46,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:46,817 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 04:53:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064485731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:46,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:46,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:46,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108895590] [2021-06-05 04:53:46,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:46,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:46,846 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:47,158 INFO L93 Difference]: Finished difference Result 140 states and 271 transitions. [2021-06-05 04:53:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:47,159 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:53:47,159 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:53:47,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:53:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 106. [2021-06-05 04:53:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 04:53:47,160 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 04:53:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:47,160 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 04:53:47,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 04:53:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:47,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:47,160 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:47,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24114 [2021-06-05 04:53:47,361 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash -918210940, now seen corresponding path program 520 times [2021-06-05 04:53:47,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:47,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011271175] [2021-06-05 04:53:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:47,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011271175] [2021-06-05 04:53:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011271175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521396296] [2021-06-05 04:53:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:47,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:47,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521396296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:47,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:47,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031021750] [2021-06-05 04:53:47,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:47,650 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:47,980 INFO L93 Difference]: Finished difference Result 165 states and 314 transitions. [2021-06-05 04:53:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:53:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:47,980 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:53:47,980 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:53:47,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:53:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 109. [2021-06-05 04:53:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 04:53:47,982 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 04:53:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:47,982 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 04:53:47,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 04:53:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:47,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:47,982 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:48,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24137 [2021-06-05 04:53:48,183 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1453440742, now seen corresponding path program 521 times [2021-06-05 04:53:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:48,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112340840] [2021-06-05 04:53:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:48,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112340840] [2021-06-05 04:53:48,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112340840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775443300] [2021-06-05 04:53:48,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:48,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:53:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:48,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:48,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775443300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:48,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:48,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728184133] [2021-06-05 04:53:48,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:48,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:48,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:48,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:48,473 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:48,660 INFO L93 Difference]: Finished difference Result 130 states and 262 transitions. [2021-06-05 04:53:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:48,661 INFO L225 Difference]: With dead ends: 130 [2021-06-05 04:53:48,661 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:53:48,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:53:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-06-05 04:53:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 04:53:48,662 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 04:53:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:48,662 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 04:53:48,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 04:53:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:48,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:48,662 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:48,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24148 [2021-06-05 04:53:48,863 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1818161277, now seen corresponding path program 522 times [2021-06-05 04:53:48,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:48,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831284492] [2021-06-05 04:53:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:48,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:48,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831284492] [2021-06-05 04:53:48,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831284492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513584461] [2021-06-05 04:53:48,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:49,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:49,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513584461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:49,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:49,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711878122] [2021-06-05 04:53:49,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:49,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:49,369 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:49,688 INFO L93 Difference]: Finished difference Result 149 states and 290 transitions. [2021-06-05 04:53:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:53:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:49,689 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:53:49,689 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:53:49,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:53:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 108. [2021-06-05 04:53:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 04:53:49,690 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 04:53:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:49,690 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 04:53:49,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 04:53:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:49,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:49,690 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:49,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24152,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:49,891 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -865695420, now seen corresponding path program 523 times [2021-06-05 04:53:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:49,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820842333] [2021-06-05 04:53:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:49,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:49,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820842333] [2021-06-05 04:53:49,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820842333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:49,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849900692] [2021-06-05 04:53:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:50,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849900692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:50,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:50,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:50,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659502663] [2021-06-05 04:53:50,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:50,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:50,165 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:50,311 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 04:53:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:50,312 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:53:50,312 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:53:50,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:53:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2021-06-05 04:53:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 04:53:50,313 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 04:53:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 04:53:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 04:53:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:50,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:50,313 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:50,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24174,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:50,514 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1464113487, now seen corresponding path program 524 times [2021-06-05 04:53:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:50,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402207764] [2021-06-05 04:53:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:50,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:50,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402207764] [2021-06-05 04:53:50,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402207764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:50,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155346735] [2021-06-05 04:53:50,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:50,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:50,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155346735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:50,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:50,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:53:50,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564560923] [2021-06-05 04:53:50,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:50,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:50,986 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:51,301 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-06-05 04:53:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:51,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:51,301 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:53:51,301 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:53:51,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:53:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2021-06-05 04:53:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 04:53:51,303 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 04:53:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:51,303 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 04:53:51,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 04:53:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:51,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:51,303 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:51,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24178,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:51,503 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash 174540378, now seen corresponding path program 525 times [2021-06-05 04:53:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:51,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63548970] [2021-06-05 04:53:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:51,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:51,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63548970] [2021-06-05 04:53:51,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63548970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183967384] [2021-06-05 04:53:51,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:51,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:51,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183967384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:51,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:53:51,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202376561] [2021-06-05 04:53:51,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:53:51,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:53:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:53:51,764 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:51,919 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-06-05 04:53:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:53:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:51,919 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:53:51,919 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 04:53:51,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 04:53:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-05 04:53:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 04:53:51,920 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 04:53:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:51,920 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 04:53:51,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 04:53:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:51,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:51,921 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:52,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24199 [2021-06-05 04:53:52,121 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash 135416067, now seen corresponding path program 526 times [2021-06-05 04:53:52,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374045366] [2021-06-05 04:53:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:52,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:52,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374045366] [2021-06-05 04:53:52,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374045366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:52,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888676740] [2021-06-05 04:53:52,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:52,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:52,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:52,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:52,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:52,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888676740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:52,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:52,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:53:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322694967] [2021-06-05 04:53:52,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:52,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:52,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:52,485 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:52,781 INFO L93 Difference]: Finished difference Result 137 states and 262 transitions. [2021-06-05 04:53:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:53:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:52,781 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:53:52,781 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:53:52,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:53:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2021-06-05 04:53:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-06-05 04:53:52,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-06-05 04:53:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:52,782 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-06-05 04:53:52,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-06-05 04:53:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:52,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:52,787 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24203 [2021-06-05 04:53:52,989 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1512107592, now seen corresponding path program 527 times [2021-06-05 04:53:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706686168] [2021-06-05 04:53:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:53,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706686168] [2021-06-05 04:53:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706686168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083503902] [2021-06-05 04:53:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:53,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:53:53,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:53,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083503902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:53,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:53:53,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118045246] [2021-06-05 04:53:53,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:53:53,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:53:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:53:53,228 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:53,392 INFO L93 Difference]: Finished difference Result 148 states and 284 transitions. [2021-06-05 04:53:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:53:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:53,393 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:53:53,393 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:53:53,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:53:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2021-06-05 04:53:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 201 transitions. [2021-06-05 04:53:53,394 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 201 transitions. Word has length 19 [2021-06-05 04:53:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:53,394 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 201 transitions. [2021-06-05 04:53:53,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 201 transitions. [2021-06-05 04:53:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:53:53,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:53,394 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:53,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24214 [2021-06-05 04:53:53,595 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1050497555, now seen corresponding path program 528 times [2021-06-05 04:53:53,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:53,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512493986] [2021-06-05 04:53:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:53,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512493986] [2021-06-05 04:53:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512493986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066348368] [2021-06-05 04:53:53,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:53,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:53:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:53,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066348368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:53,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:53:53,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430676782] [2021-06-05 04:53:53,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:53:53,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:53,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:53:53,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:53:53,897 INFO L87 Difference]: Start difference. First operand 100 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:54,202 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 04:53:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:53:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:54,203 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:53:54,203 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:53:54,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:53:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-06-05 04:53:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 99 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 200 transitions. [2021-06-05 04:53:54,204 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 200 transitions. Word has length 19 [2021-06-05 04:53:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:54,204 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 200 transitions. [2021-06-05 04:53:54,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 200 transitions. [2021-06-05 04:53:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:53:54,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:54,204 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:54,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24218,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:54,405 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash 40501395, now seen corresponding path program 529 times [2021-06-05 04:53:54,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:54,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525459864] [2021-06-05 04:53:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:54,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525459864] [2021-06-05 04:53:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525459864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216954533] [2021-06-05 04:53:54,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:53:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:55,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:55,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:53:55,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:55,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:55,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:55,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:53:55,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,364 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 04:53:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:55,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:55,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:55,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:55,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:55,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:55,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:55,424 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:53:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216954533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:55,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:55,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:53:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550234165] [2021-06-05 04:53:55,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:55,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:55,500 INFO L87 Difference]: Start difference. First operand 100 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:56,149 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 04:53:56,630 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 04:53:56,970 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 04:53:57,099 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 04:53:57,450 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 04:53:57,579 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 04:53:57,852 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 04:53:57,998 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-06-05 04:53:58,130 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 04:53:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:58,400 INFO L93 Difference]: Finished difference Result 231 states and 463 transitions. [2021-06-05 04:53:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:53:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:53:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:58,400 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:53:58,400 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:53:58,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2925.7ms TimeCoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:53:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:53:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 106. [2021-06-05 04:53:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 04:53:58,402 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 20 [2021-06-05 04:53:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:58,402 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 04:53:58,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 04:53:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:53:58,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:58,403 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:58,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24228,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:58,609 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1637276287, now seen corresponding path program 530 times [2021-06-05 04:53:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:58,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500147793] [2021-06-05 04:53:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:58,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:58,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500147793] [2021-06-05 04:53:58,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500147793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:58,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129541714] [2021-06-05 04:53:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:58,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:53:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:59,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:59,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:59,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:53:59,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:59,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:59,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:59,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:53:59,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,562 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 04:53:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:59,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:59,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:59,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:59,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:59,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:59,624 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:53:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129541714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:59,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:59,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:53:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15786903] [2021-06-05 04:53:59,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:53:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:53:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:59,700 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:00,346 INFO L93 Difference]: Finished difference Result 164 states and 325 transitions. [2021-06-05 04:54:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:54:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:00,347 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:54:00,347 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:54:00,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:54:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:54:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-06-05 04:54:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 04:54:00,348 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 20 [2021-06-05 04:54:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:00,348 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 04:54:00,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 04:54:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:00,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:00,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:00,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24319,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:00,549 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash 759200197, now seen corresponding path program 531 times [2021-06-05 04:54:00,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:00,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424298011] [2021-06-05 04:54:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:00,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:00,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424298011] [2021-06-05 04:54:00,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424298011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:00,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890361109] [2021-06-05 04:54:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:00,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:54:00,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:54:01,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:01,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:01,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:01,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,434 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 04:54:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:01,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:01,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:01,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:01,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:01,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:01,495 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:01,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890361109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:01,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:01,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:01,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752745160] [2021-06-05 04:54:01,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:01,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:01,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:01,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:01,571 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:01,860 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:54:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:01,924 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 04:54:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:54:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:01,924 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:54:01,924 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:54:01,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:54:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:54:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-06-05 04:54:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 221 transitions. [2021-06-05 04:54:01,926 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 221 transitions. Word has length 20 [2021-06-05 04:54:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:01,926 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 221 transitions. [2021-06-05 04:54:01,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 221 transitions. [2021-06-05 04:54:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:01,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:01,926 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:02,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24411 [2021-06-05 04:54:02,126 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash -271872767, now seen corresponding path program 532 times [2021-06-05 04:54:02,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:02,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368322213] [2021-06-05 04:54:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:02,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368322213] [2021-06-05 04:54:02,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368322213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876407492] [2021-06-05 04:54:02,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:02,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:03,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:03,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:03,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:54:03,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:03,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:03,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:03,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,107 INFO L628 ElimStorePlain]: treesize reduction 106, result has 36.1 percent of original size [2021-06-05 04:54:03,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:03,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:03,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:03,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:03,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:03,168 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:03,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876407492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:03,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:03,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033321276] [2021-06-05 04:54:03,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:03,243 INFO L87 Difference]: Start difference. First operand 109 states and 221 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:03,777 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:54:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:03,834 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-06-05 04:54:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:54:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:03,834 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:54:03,834 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:54:03,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 834.5ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:54:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-06-05 04:54:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-06-05 04:54:03,836 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 20 [2021-06-05 04:54:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:03,836 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-06-05 04:54:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-06-05 04:54:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:03,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:03,836 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:04,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24501 [2021-06-05 04:54:04,036 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2050171461, now seen corresponding path program 533 times [2021-06-05 04:54:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:04,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361047049] [2021-06-05 04:54:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:04,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361047049] [2021-06-05 04:54:04,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361047049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543042692] [2021-06-05 04:54:04,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:04,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:54:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:05,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:05,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:05,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:54:05,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:05,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:05,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:05,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,104 INFO L628 ElimStorePlain]: treesize reduction 141, result has 30.2 percent of original size [2021-06-05 04:54:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:05,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:05,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:05,129 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:05,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:05,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:05,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:05,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:05,167 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 04:54:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543042692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:05,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:05,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051697306] [2021-06-05 04:54:05,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:05,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:05,244 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,379 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2021-06-05 04:54:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:05,939 INFO L93 Difference]: Finished difference Result 162 states and 317 transitions. [2021-06-05 04:54:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:54:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:05,939 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:54:05,939 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:54:05,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 954.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:54:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-06-05 04:54:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 04:54:05,940 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 20 [2021-06-05 04:54:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:05,940 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 04:54:05,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 04:54:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:05,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:05,941 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:06,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24621 [2021-06-05 04:54:06,141 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1570886785, now seen corresponding path program 534 times [2021-06-05 04:54:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:06,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962594360] [2021-06-05 04:54:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:06,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:06,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962594360] [2021-06-05 04:54:06,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962594360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:06,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498977029] [2021-06-05 04:54:06,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:06,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:54:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:07,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:07,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:07,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:07,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:07,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:54:07,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:07,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:07,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,703 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-06-05 04:54:07,703 INFO L628 ElimStorePlain]: treesize reduction 480, result has 19.3 percent of original size [2021-06-05 04:54:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:07,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:07,752 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:07,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:07,837 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:07,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:07,916 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:07,953 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:07,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:07,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:07,987 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:777, output treesize:73 [2021-06-05 04:54:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498977029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:08,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:08,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:08,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657571638] [2021-06-05 04:54:08,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:08,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:08,122 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:08,268 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2021-06-05 04:54:08,449 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 04:54:09,106 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 04:54:09,279 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-06-05 04:54:09,547 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-06-05 04:54:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:09,991 INFO L93 Difference]: Finished difference Result 272 states and 518 transitions. [2021-06-05 04:54:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:54:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:09,991 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:54:09,991 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:54:09,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2020.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:54:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:54:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 115. [2021-06-05 04:54:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 04:54:09,993 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 20 [2021-06-05 04:54:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:09,993 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 04:54:09,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 04:54:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:09,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:09,993 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:10,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24778 [2021-06-05 04:54:10,194 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1353228433, now seen corresponding path program 535 times [2021-06-05 04:54:10,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:10,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775337317] [2021-06-05 04:54:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775337317] [2021-06-05 04:54:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775337317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413116238] [2021-06-05 04:54:10,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:11,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:11,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:11,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:11,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:11,241 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:11,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:11,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:11,258 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,315 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:11,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:11,318 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:11,321 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:11,324 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:11,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:11,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:11,345 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:54:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:11,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413116238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:11,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:11,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:11,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090919518] [2021-06-05 04:54:11,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:11,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:11,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:11,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:11,421 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:11,846 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 04:54:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:12,020 INFO L93 Difference]: Finished difference Result 170 states and 345 transitions. [2021-06-05 04:54:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:54:12,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:12,020 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:54:12,020 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:54:12,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:54:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-06-05 04:54:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-06-05 04:54:12,022 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 20 [2021-06-05 04:54:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:12,022 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-06-05 04:54:12,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-06-05 04:54:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:12,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:12,022 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:12,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24954 [2021-06-05 04:54:12,223 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1910665899, now seen corresponding path program 536 times [2021-06-05 04:54:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:12,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459434829] [2021-06-05 04:54:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:12,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:12,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459434829] [2021-06-05 04:54:12,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459434829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:12,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378884868] [2021-06-05 04:54:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:13,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:13,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:13,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,317 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:13,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,326 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,329 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:13,334 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:13,338 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:54:13,346 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,349 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:13,352 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,403 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:13,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:13,406 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:13,409 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:13,412 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:13,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:13,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:13,434 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:54:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:13,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378884868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:13,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:13,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:13,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280958653] [2021-06-05 04:54:13,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:13,513 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:13,921 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:54:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:14,048 INFO L93 Difference]: Finished difference Result 167 states and 339 transitions. [2021-06-05 04:54:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:54:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:14,048 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:54:14,048 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:54:14,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:54:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-06-05 04:54:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.094017094017094) internal successors, (245), 117 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 245 transitions. [2021-06-05 04:54:14,049 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 245 transitions. Word has length 20 [2021-06-05 04:54:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:14,050 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 245 transitions. [2021-06-05 04:54:14,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 245 transitions. [2021-06-05 04:54:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:14,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:14,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:14,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25128 [2021-06-05 04:54:14,250 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:14,250 INFO L82 PathProgramCache]: Analyzing trace with hash -62257169, now seen corresponding path program 537 times [2021-06-05 04:54:14,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:14,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241253698] [2021-06-05 04:54:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:14,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:14,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241253698] [2021-06-05 04:54:14,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241253698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:14,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038386146] [2021-06-05 04:54:14,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:14,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:54:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:15,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:15,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:15,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:15,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:15,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,292 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:15,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,300 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,304 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:15,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,311 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,315 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:15,319 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:15,321 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,372 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:15,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:15,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:15,378 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:15,381 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:15,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:15,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:15,403 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:579, output treesize:52 [2021-06-05 04:54:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:15,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038386146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:15,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:15,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650970912] [2021-06-05 04:54:15,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:15,482 INFO L87 Difference]: Start difference. First operand 118 states and 245 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:15,910 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:54:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:16,006 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-06-05 04:54:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:54:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:16,007 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:54:16,007 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:54:16,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:54:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2021-06-05 04:54:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.093220338983051) internal successors, (247), 118 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 247 transitions. [2021-06-05 04:54:16,008 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 247 transitions. Word has length 20 [2021-06-05 04:54:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:16,008 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 247 transitions. [2021-06-05 04:54:16,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 247 transitions. [2021-06-05 04:54:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:16,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:16,008 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25344 [2021-06-05 04:54:16,209 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash -541541845, now seen corresponding path program 538 times [2021-06-05 04:54:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:16,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500395473] [2021-06-05 04:54:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:16,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:16,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500395473] [2021-06-05 04:54:16,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500395473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:16,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086315459] [2021-06-05 04:54:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:16,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:16,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:16,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:17,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:17,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:17,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:17,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:17,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:17,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:17,388 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:17,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,396 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:17,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:54:17,401 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:17,404 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,496 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:54:17,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:17,508 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:17,512 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:17,515 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:17,519 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:17,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:17,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:17,557 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:54:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:17,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086315459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:17,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:17,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:17,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194793564] [2021-06-05 04:54:17,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:17,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:17,693 INFO L87 Difference]: Start difference. First operand 119 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:18,310 INFO L93 Difference]: Finished difference Result 182 states and 357 transitions. [2021-06-05 04:54:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:54:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:18,311 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:54:18,311 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 04:54:18,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 04:54:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 121. [2021-06-05 04:54:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 120 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 253 transitions. [2021-06-05 04:54:18,312 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 253 transitions. Word has length 20 [2021-06-05 04:54:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:18,312 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 253 transitions. [2021-06-05 04:54:18,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 253 transitions. [2021-06-05 04:54:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:18,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:18,313 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:18,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25487,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:18,513 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1344065599, now seen corresponding path program 539 times [2021-06-05 04:54:18,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:18,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755083039] [2021-06-05 04:54:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:18,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755083039] [2021-06-05 04:54:18,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755083039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753387872] [2021-06-05 04:54:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:18,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:54:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:19,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:19,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:19,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:19,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:19,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:19,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:19,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,570 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:54:19,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:19,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:19,577 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:19,580 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:19,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:19,605 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:54:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:19,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753387872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:19,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:19,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895850460] [2021-06-05 04:54:19,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:19,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:19,710 INFO L87 Difference]: Start difference. First operand 121 states and 253 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:20,024 INFO L93 Difference]: Finished difference Result 166 states and 334 transitions. [2021-06-05 04:54:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:54:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:20,024 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:54:20,024 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:54:20,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:54:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2021-06-05 04:54:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 122 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 257 transitions. [2021-06-05 04:54:20,026 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 257 transitions. Word has length 20 [2021-06-05 04:54:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:20,026 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 257 transitions. [2021-06-05 04:54:20,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 257 transitions. [2021-06-05 04:54:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:20,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:20,026 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:20,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25745,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:20,226 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 977978629, now seen corresponding path program 540 times [2021-06-05 04:54:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:20,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809548340] [2021-06-05 04:54:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:20,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809548340] [2021-06-05 04:54:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809548340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273677545] [2021-06-05 04:54:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:20,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:54:20,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:21,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:21,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:21,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:21,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:21,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:21,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,188 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,191 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:21,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:21,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:21,198 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,256 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:54:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:21,259 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:21,262 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:21,265 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:21,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:21,290 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:54:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:21,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273677545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:21,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144477940] [2021-06-05 04:54:21,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:21,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:21,395 INFO L87 Difference]: Start difference. First operand 123 states and 257 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:21,812 INFO L93 Difference]: Finished difference Result 169 states and 345 transitions. [2021-06-05 04:54:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:54:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:21,813 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:54:21,813 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:54:21,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:54:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2021-06-05 04:54:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-06-05 04:54:21,814 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 20 [2021-06-05 04:54:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:21,814 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-06-05 04:54:21,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-06-05 04:54:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:21,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:21,815 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:22,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25850,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:22,015 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 498693953, now seen corresponding path program 541 times [2021-06-05 04:54:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:22,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903069930] [2021-06-05 04:54:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:22,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:22,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903069930] [2021-06-05 04:54:22,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903069930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:22,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407634030] [2021-06-05 04:54:22,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:22,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:22,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:22,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:22,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:22,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:22,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:22,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:22,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:22,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:22,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:54:22,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:23,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:23,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:23,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:23,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:23,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:23,028 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:23,037 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:23,042 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:23,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:23,047 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:23,051 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,151 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 04:54:23,152 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:54:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:23,156 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,159 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:23,163 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:23,167 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:23,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:23,210 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:54:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:23,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407634030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:23,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:23,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:23,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335939547] [2021-06-05 04:54:23,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:23,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:23,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:23,380 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:24,337 INFO L93 Difference]: Finished difference Result 234 states and 460 transitions. [2021-06-05 04:54:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:54:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:24,338 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:54:24,338 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:54:24,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1048.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:54:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:54:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2021-06-05 04:54:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 124 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 261 transitions. [2021-06-05 04:54:24,339 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 261 transitions. Word has length 20 [2021-06-05 04:54:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:24,339 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 261 transitions. [2021-06-05 04:54:24,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 261 transitions. [2021-06-05 04:54:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:24,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:24,340 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25992,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:24,540 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1565723951, now seen corresponding path program 542 times [2021-06-05 04:54:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:24,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416615109] [2021-06-05 04:54:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:24,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416615109] [2021-06-05 04:54:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416615109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048906486] [2021-06-05 04:54:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:24,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:24,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:24,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:24,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:25,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:25,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:25,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:25,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:25,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:25,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:25,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:25,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:25,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:25,112 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:54:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:25,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048906486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:25,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:25,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:25,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374037292] [2021-06-05 04:54:25,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:25,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:25,184 INFO L87 Difference]: Start difference. First operand 125 states and 261 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:25,530 INFO L93 Difference]: Finished difference Result 172 states and 351 transitions. [2021-06-05 04:54:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:54:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:25,530 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:54:25,531 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:54:25,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:54:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:54:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2021-06-05 04:54:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 126 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 265 transitions. [2021-06-05 04:54:25,532 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 265 transitions. Word has length 20 [2021-06-05 04:54:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:25,532 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 265 transitions. [2021-06-05 04:54:25,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 265 transitions. [2021-06-05 04:54:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:25,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:25,532 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:25,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26129 [2021-06-05 04:54:25,733 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1086439275, now seen corresponding path program 543 times [2021-06-05 04:54:25,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:25,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812050794] [2021-06-05 04:54:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:25,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:25,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812050794] [2021-06-05 04:54:25,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812050794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:25,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520020350] [2021-06-05 04:54:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:26,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:26,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:26,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:26,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:26,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:26,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:26,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:26,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:26,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:26,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:26,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:26,352 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:54:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520020350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:26,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:26,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51594979] [2021-06-05 04:54:26,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:26,481 INFO L87 Difference]: Start difference. First operand 127 states and 265 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:26,996 INFO L93 Difference]: Finished difference Result 190 states and 375 transitions. [2021-06-05 04:54:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:54:26,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:26,996 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:54:26,996 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:54:26,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 704.0ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:54:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2021-06-05 04:54:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-06-05 04:54:26,998 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 20 [2021-06-05 04:54:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:26,998 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-06-05 04:54:26,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-06-05 04:54:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:26,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:26,998 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:27,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26153,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:27,199 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:27,199 INFO L82 PathProgramCache]: Analyzing trace with hash 551209473, now seen corresponding path program 544 times [2021-06-05 04:54:27,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:27,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509349612] [2021-06-05 04:54:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:27,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:27,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509349612] [2021-06-05 04:54:27,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509349612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:27,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743505990] [2021-06-05 04:54:27,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:27,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:27,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:27,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:27,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:27,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:27,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:27,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:27,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:27,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:27,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:27,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:27,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:27,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:27,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:54:27,827 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 04:54:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:27,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743505990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:27,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:27,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:27,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957560396] [2021-06-05 04:54:27,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:27,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:27,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:27,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:27,988 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:28,817 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-06-05 04:54:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:54:28,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:28,818 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:54:28,818 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:54:28,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:54:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:54:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-06-05 04:54:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1102362204724407) internal successors, (268), 127 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 268 transitions. [2021-06-05 04:54:28,819 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 268 transitions. Word has length 20 [2021-06-05 04:54:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:28,819 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 268 transitions. [2021-06-05 04:54:28,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 268 transitions. [2021-06-05 04:54:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:28,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:28,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:29,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26180 [2021-06-05 04:54:29,020 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1401064339, now seen corresponding path program 545 times [2021-06-05 04:54:29,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:29,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185618513] [2021-06-05 04:54:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:29,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185618513] [2021-06-05 04:54:29,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185618513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963266691] [2021-06-05 04:54:29,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:29,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:54:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:29,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:29,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:29,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:29,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:54:29,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:29,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:29,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:29,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:29,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:29,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,049 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 04:54:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:30,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:30,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:30,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:30,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:30,123 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963266691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:30,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:30,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530057468] [2021-06-05 04:54:30,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:30,197 INFO L87 Difference]: Start difference. First operand 128 states and 268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:30,504 INFO L93 Difference]: Finished difference Result 160 states and 321 transitions. [2021-06-05 04:54:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:54:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:30,504 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:54:30,504 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:54:30,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:54:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:54:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-06-05 04:54:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1076923076923078) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2021-06-05 04:54:30,505 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 20 [2021-06-05 04:54:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:30,506 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2021-06-05 04:54:30,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2021-06-05 04:54:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:30,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:30,506 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:30,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26212,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:30,706 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:30,706 INFO L82 PathProgramCache]: Analyzing trace with hash -497426473, now seen corresponding path program 546 times [2021-06-05 04:54:30,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:30,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598773582] [2021-06-05 04:54:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:30,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598773582] [2021-06-05 04:54:30,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598773582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887667958] [2021-06-05 04:54:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:31,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:54:31,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:31,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:31,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:54:31,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:31,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,673 INFO L628 ElimStorePlain]: treesize reduction 118, result has 34.4 percent of original size [2021-06-05 04:54:31,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:31,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:31,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:31,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:31,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:31,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:31,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:31,734 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:31,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887667958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:31,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:31,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:31,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158104626] [2021-06-05 04:54:31,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:31,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:31,808 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,161 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:54:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:32,297 INFO L93 Difference]: Finished difference Result 164 states and 336 transitions. [2021-06-05 04:54:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:54:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:32,297 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:54:32,297 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:54:32,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:54:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-06-05 04:54:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1068702290076335) internal successors, (276), 131 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 276 transitions. [2021-06-05 04:54:32,299 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 276 transitions. Word has length 20 [2021-06-05 04:54:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:32,299 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 276 transitions. [2021-06-05 04:54:32,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 276 transitions. [2021-06-05 04:54:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:32,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:32,299 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:32,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26366,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:32,499 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:32,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1528499437, now seen corresponding path program 547 times [2021-06-05 04:54:32,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:32,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827488354] [2021-06-05 04:54:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:32,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827488354] [2021-06-05 04:54:32,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827488354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259354127] [2021-06-05 04:54:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:33,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:33,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:33,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:54:33,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:33,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:33,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:33,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:33,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,513 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 04:54:33,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:33,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:33,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:33,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:33,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:33,573 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:33,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259354127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:33,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:33,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:33,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019427782] [2021-06-05 04:54:33,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:33,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:33,648 INFO L87 Difference]: Start difference. First operand 132 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:34,176 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:54:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:34,211 INFO L93 Difference]: Finished difference Result 165 states and 333 transitions. [2021-06-05 04:54:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:54:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:34,211 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:54:34,211 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:54:34,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 851.1ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:54:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2021-06-05 04:54:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.106060606060606) internal successors, (278), 132 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 278 transitions. [2021-06-05 04:54:34,213 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 278 transitions. Word has length 20 [2021-06-05 04:54:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:34,213 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 278 transitions. [2021-06-05 04:54:34,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 278 transitions. [2021-06-05 04:54:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:34,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:34,213 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:34,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26479 [2021-06-05 04:54:34,414 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash 793544791, now seen corresponding path program 548 times [2021-06-05 04:54:34,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:34,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963914135] [2021-06-05 04:54:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:34,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:34,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963914135] [2021-06-05 04:54:34,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963914135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:34,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779113115] [2021-06-05 04:54:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:35,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:35,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:54:35,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:35,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:35,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:35,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,308 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-06-05 04:54:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:35,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:35,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:35,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:35,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:35,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:35,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:35,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:35,370 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:54:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:35,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779113115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:35,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:35,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397754461] [2021-06-05 04:54:35,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:35,446 INFO L87 Difference]: Start difference. First operand 133 states and 278 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:35,906 INFO L93 Difference]: Finished difference Result 158 states and 324 transitions. [2021-06-05 04:54:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:54:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:35,907 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:54:35,907 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:54:35,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:54:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 134. [2021-06-05 04:54:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 280 transitions. [2021-06-05 04:54:35,908 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 280 transitions. Word has length 20 [2021-06-05 04:54:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:35,908 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 280 transitions. [2021-06-05 04:54:35,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 280 transitions. [2021-06-05 04:54:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:35,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:35,908 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:36,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26577,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:36,109 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash 314260115, now seen corresponding path program 549 times [2021-06-05 04:54:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:36,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238053622] [2021-06-05 04:54:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:36,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238053622] [2021-06-05 04:54:36,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238053622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679206660] [2021-06-05 04:54:36,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:37,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:37,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:37,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:37,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:37,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:37,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:37,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:54:37,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,534 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-06-05 04:54:37,535 INFO L628 ElimStorePlain]: treesize reduction 496, result has 19.5 percent of original size [2021-06-05 04:54:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:37,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:37,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:37,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:37,754 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:37,825 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 04:54:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679206660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:54:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287323803] [2021-06-05 04:54:37,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:54:37,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:54:37,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:37,962 INFO L87 Difference]: Start difference. First operand 134 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:38,451 INFO L93 Difference]: Finished difference Result 176 states and 348 transitions. [2021-06-05 04:54:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:54:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:38,451 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:54:38,451 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:54:38,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:54:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:54:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2021-06-05 04:54:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1076923076923078) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2021-06-05 04:54:38,453 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 20 [2021-06-05 04:54:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:38,453 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2021-06-05 04:54:38,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2021-06-05 04:54:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:38,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:38,453 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:38,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26635 [2021-06-05 04:54:38,653 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:38,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1685112193, now seen corresponding path program 550 times [2021-06-05 04:54:38,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:38,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895243454] [2021-06-05 04:54:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895243454] [2021-06-05 04:54:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895243454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538096606] [2021-06-05 04:54:38,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:38,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:38,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:39,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:39,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:39,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:39,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:39,700 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:39,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:39,709 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,712 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,716 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:54:39,720 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,723 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,774 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:39,778 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:39,781 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:39,784 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:39,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:39,805 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:54:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538096606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:39,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:39,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049146727] [2021-06-05 04:54:39,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:39,884 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,398 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-06-05 04:54:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:54:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,399 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:54:40,399 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:54:40,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:54:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2021-06-05 04:54:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.106060606060606) internal successors, (278), 132 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 278 transitions. [2021-06-05 04:54:40,400 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 278 transitions. Word has length 20 [2021-06-05 04:54:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,400 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 278 transitions. [2021-06-05 04:54:40,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 278 transitions. [2021-06-05 04:54:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:40,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,400 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26778 [2021-06-05 04:54:40,601 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash 654039229, now seen corresponding path program 551 times [2021-06-05 04:54:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423405482] [2021-06-05 04:54:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423405482] [2021-06-05 04:54:40,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423405482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104853365] [2021-06-05 04:54:40,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:40,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:54:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:41,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:41,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:41,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:41,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:41,660 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:41,664 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:41,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,672 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:54:41,676 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:41,679 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,730 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:41,734 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:41,737 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:41,739 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:41,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:41,761 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:54:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:41,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104853365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:41,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:41,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:41,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342931192] [2021-06-05 04:54:41,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:41,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:41,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:41,839 INFO L87 Difference]: Start difference. First operand 133 states and 278 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,187 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:54:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,287 INFO L93 Difference]: Finished difference Result 162 states and 332 transitions. [2021-06-05 04:54:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:54:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,287 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:54:42,287 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:54:42,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:54:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 04:54:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 280 transitions. [2021-06-05 04:54:42,289 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 280 transitions. Word has length 20 [2021-06-05 04:54:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,289 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 280 transitions. [2021-06-05 04:54:42,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 280 transitions. [2021-06-05 04:54:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:42,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,289 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26880 [2021-06-05 04:54:42,490 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1318883839, now seen corresponding path program 552 times [2021-06-05 04:54:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181382614] [2021-06-05 04:54:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181382614] [2021-06-05 04:54:42,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181382614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:42,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164725828] [2021-06-05 04:54:42,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:42,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:54:42,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:43,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:43,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:43,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:43,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:43,610 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:43,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:43,634 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:43,638 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:43,641 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,692 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:43,696 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:43,699 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:43,702 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:43,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:43,723 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:579, output treesize:52 [2021-06-05 04:54:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164725828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:43,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:43,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872655580] [2021-06-05 04:54:43,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:43,803 INFO L87 Difference]: Start difference. First operand 134 states and 280 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,227 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:54:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,317 INFO L93 Difference]: Finished difference Result 159 states and 326 transitions. [2021-06-05 04:54:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:54:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,317 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:54:44,317 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:54:44,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:54:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 04:54:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1044776119402986) internal successors, (282), 134 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 282 transitions. [2021-06-05 04:54:44,319 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 282 transitions. Word has length 20 [2021-06-05 04:54:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,319 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 282 transitions. [2021-06-05 04:54:44,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 282 transitions. [2021-06-05 04:54:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:44,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27052,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:44,520 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1798168515, now seen corresponding path program 553 times [2021-06-05 04:54:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361129023] [2021-06-05 04:54:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361129023] [2021-06-05 04:54:44,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361129023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:44,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843702340] [2021-06-05 04:54:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:44,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:45,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:45,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:45,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:45,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,616 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:45,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:45,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:45,639 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:45,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,648 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:45,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:54:45,656 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,748 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:54:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:45,753 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:45,756 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:45,759 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:45,763 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:45,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:45,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:45,801 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:54:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843702340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:45,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:45,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:45,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137706302] [2021-06-05 04:54:45,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:45,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:45,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:45,946 INFO L87 Difference]: Start difference. First operand 135 states and 282 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,067 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-06-05 04:54:46,726 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-05 04:54:46,884 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 04:54:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,346 INFO L93 Difference]: Finished difference Result 251 states and 491 transitions. [2021-06-05 04:54:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:54:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,347 INFO L225 Difference]: With dead ends: 251 [2021-06-05 04:54:47,347 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:54:47,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1538.0ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:54:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:54:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2021-06-05 04:54:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1037037037037036) internal successors, (284), 135 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 284 transitions. [2021-06-05 04:54:47,348 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 284 transitions. Word has length 20 [2021-06-05 04:54:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,348 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 284 transitions. [2021-06-05 04:54:47,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 284 transitions. [2021-06-05 04:54:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:47,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27272 [2021-06-05 04:54:47,549 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1694275027, now seen corresponding path program 554 times [2021-06-05 04:54:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591106959] [2021-06-05 04:54:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591106959] [2021-06-05 04:54:47,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591106959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:47,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302802207] [2021-06-05 04:54:47,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:47,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:47,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:47,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:48,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:48,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:48,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:48,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,519 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:48,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:48,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:48,531 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,534 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:48,537 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,595 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:54:48,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:48,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:48,602 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:48,605 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:48,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:48,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:48,630 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:54:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302802207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:48,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:48,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455954047] [2021-06-05 04:54:48,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:48,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:48,739 INFO L87 Difference]: Start difference. First operand 136 states and 284 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,230 INFO L93 Difference]: Finished difference Result 166 states and 340 transitions. [2021-06-05 04:54:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:54:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,231 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:54:49,231 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:54:49,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:54:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:54:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2021-06-05 04:54:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.102189781021898) internal successors, (288), 137 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 288 transitions. [2021-06-05 04:54:49,232 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 288 transitions. Word has length 20 [2021-06-05 04:54:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,232 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 288 transitions. [2021-06-05 04:54:49,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 288 transitions. [2021-06-05 04:54:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:49,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,233 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27389,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:49,433 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -278648041, now seen corresponding path program 555 times [2021-06-05 04:54:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796319405] [2021-06-05 04:54:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796319405] [2021-06-05 04:54:49,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796319405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836998529] [2021-06-05 04:54:49,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:49,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:50,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:50,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:50,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:50,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:50,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:50,476 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:50,480 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:50,487 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,546 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:54:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:50,549 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:50,552 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:50,555 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:50,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:50,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:50,581 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:54:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836998529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:50,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:50,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:50,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309823148] [2021-06-05 04:54:50,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:50,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:50,690 INFO L87 Difference]: Start difference. First operand 138 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,115 INFO L93 Difference]: Finished difference Result 164 states and 332 transitions. [2021-06-05 04:54:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:54:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,116 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:54:51,116 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:54:51,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:54:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 04:54:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 04:54:51,117 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 04:54:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,117 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 04:54:51,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 04:54:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:51,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,118 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27572,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:51,318 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,319 INFO L82 PathProgramCache]: Analyzing trace with hash -757932717, now seen corresponding path program 556 times [2021-06-05 04:54:51,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532203058] [2021-06-05 04:54:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532203058] [2021-06-05 04:54:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532203058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:51,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227659567] [2021-06-05 04:54:51,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:51,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:51,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:52,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:52,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:52,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:52,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:52,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,385 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:52,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,400 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:52,404 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:54:52,409 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:52,414 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:52,418 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,520 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 04:54:52,520 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:54:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:52,525 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:52,528 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:52,532 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:52,535 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:52,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:52,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:52,588 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:54:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227659567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:52,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:52,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:54:52,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426393225] [2021-06-05 04:54:52,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:52,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:52,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:52,760 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,755 INFO L93 Difference]: Finished difference Result 229 states and 451 transitions. [2021-06-05 04:54:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:54:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,755 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:54:53,755 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:54:53,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1092.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:54:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:54:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 137. [2021-06-05 04:54:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1029411764705883) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 286 transitions. [2021-06-05 04:54:53,757 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 286 transitions. Word has length 20 [2021-06-05 04:54:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,757 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 286 transitions. [2021-06-05 04:54:53,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 286 transitions. [2021-06-05 04:54:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:53,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27751,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:53,958 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash 309097281, now seen corresponding path program 557 times [2021-06-05 04:54:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608548485] [2021-06-05 04:54:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608548485] [2021-06-05 04:54:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608548485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:54,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774224047] [2021-06-05 04:54:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:54,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:54:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:54,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:54,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:54,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:54,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:54,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:54,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:54,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:54,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:54,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:54,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:54,576 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 04:54:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774224047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:54,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:54,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:54,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775622031] [2021-06-05 04:54:54,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:54,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:54,653 INFO L87 Difference]: Start difference. First operand 137 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,036 INFO L93 Difference]: Finished difference Result 163 states and 334 transitions. [2021-06-05 04:54:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:54:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,036 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:54:55,036 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:54:55,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:54:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:54:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-06-05 04:54:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 04:54:55,038 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 04:54:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,038 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 04:54:55,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 04:54:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:55,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,038 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27985 [2021-06-05 04:54:55,238 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash -170187395, now seen corresponding path program 558 times [2021-06-05 04:54:55,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080909019] [2021-06-05 04:54:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080909019] [2021-06-05 04:54:55,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080909019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:55,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853677280] [2021-06-05 04:54:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:55,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:54:55,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:55,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:55,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:55,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:55,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:55,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:55,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:55,779 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:55,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:55,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:55,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:55,820 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:54:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853677280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:55,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:55,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868514061] [2021-06-05 04:54:55,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:55,951 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,451 INFO L93 Difference]: Finished difference Result 162 states and 332 transitions. [2021-06-05 04:54:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:54:56,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,451 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:54:56,451 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:54:56,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:54:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:54:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-06-05 04:54:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 04:54:56,453 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 04:54:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,453 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 04:54:56,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 04:54:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:56,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,453 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28022 [2021-06-05 04:54:56,654 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -705417197, now seen corresponding path program 559 times [2021-06-05 04:54:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941634115] [2021-06-05 04:54:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941634115] [2021-06-05 04:54:56,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941634115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:56,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179793348] [2021-06-05 04:54:56,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:57,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:57,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:57,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:57,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:57,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:57,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:57,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:57,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:57,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:57,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:57,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:57,249 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:54:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179793348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:57,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:54:57,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712512709] [2021-06-05 04:54:57,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:57,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:57,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:57,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:57,391 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:58,087 INFO L93 Difference]: Finished difference Result 170 states and 350 transitions. [2021-06-05 04:54:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:54:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:58,088 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:54:58,088 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:54:58,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:54:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:54:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-06-05 04:54:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 04:54:58,089 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 04:54:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:58,089 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 04:54:58,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 04:54:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:58,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:58,090 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:58,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28046,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:58,290 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash 624334103, now seen corresponding path program 560 times [2021-06-05 04:54:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218335447] [2021-06-05 04:54:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:58,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:58,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218335447] [2021-06-05 04:54:58,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218335447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:58,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955788211] [2021-06-05 04:54:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:58,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:58,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:54:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:59,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:54:59,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:54:59,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:54:59,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:59,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,298 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,301 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,305 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:59,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:54:59,314 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,317 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:59,320 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:59,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:54:59,324 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,373 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:54:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:59,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:59,379 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:59,382 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:59,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:59,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:59,403 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:54:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955788211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:59,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:54:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720402613] [2021-06-05 04:54:59,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:54:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:54:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:59,479 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:59,896 INFO L93 Difference]: Finished difference Result 174 states and 356 transitions. [2021-06-05 04:54:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:54:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:54:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:59,896 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:54:59,896 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:54:59,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 623.3ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:54:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:54:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2021-06-05 04:54:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.099290780141844) internal successors, (296), 141 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 296 transitions. [2021-06-05 04:54:59,898 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 296 transitions. Word has length 20 [2021-06-05 04:54:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:59,898 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 296 transitions. [2021-06-05 04:54:59,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 296 transitions. [2021-06-05 04:54:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:54:59,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:59,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:00,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28071 [2021-06-05 04:55:00,098 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash -406738861, now seen corresponding path program 561 times [2021-06-05 04:55:00,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:00,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905086984] [2021-06-05 04:55:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905086984] [2021-06-05 04:55:00,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905086984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585331664] [2021-06-05 04:55:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:00,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:55:00,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:00,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:01,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:01,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:01,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:01,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:01,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:01,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,165 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:01,169 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,173 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:01,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,184 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:01,187 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,238 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:55:01,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:01,241 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:01,244 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:01,247 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:01,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:01,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:01,269 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:55:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:01,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585331664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:01,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:01,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:01,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341006301] [2021-06-05 04:55:01,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:01,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:01,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:01,348 INFO L87 Difference]: Start difference. First operand 142 states and 296 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,703 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:55:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:01,805 INFO L93 Difference]: Finished difference Result 171 states and 350 transitions. [2021-06-05 04:55:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:55:01,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:01,806 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:55:01,806 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:55:01,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:55:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:55:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2021-06-05 04:55:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 04:55:01,807 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 04:55:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:01,807 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 04:55:01,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 04:55:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:01,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:01,807 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:02,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28173 [2021-06-05 04:55:02,008 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:02,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1915305367, now seen corresponding path program 562 times [2021-06-05 04:55:02,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:02,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215835009] [2021-06-05 04:55:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215835009] [2021-06-05 04:55:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215835009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240414167] [2021-06-05 04:55:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:02,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:03,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:03,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:03,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:03,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:03,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:03,085 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,089 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,092 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:03,097 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,100 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:03,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:03,107 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,159 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:55:03,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:03,162 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:03,165 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:03,168 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:03,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:03,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:03,190 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:55:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240414167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:03,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:03,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985311740] [2021-06-05 04:55:03,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:03,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:03,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:03,270 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,639 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:55:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:03,726 INFO L93 Difference]: Finished difference Result 168 states and 344 transitions. [2021-06-05 04:55:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:03,727 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:55:03,727 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:55:03,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:55:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:55:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-06-05 04:55:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 04:55:03,728 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 04:55:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:03,728 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 04:55:03,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 04:55:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:03,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:03,728 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:03,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28350,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:03,929 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1436020691, now seen corresponding path program 563 times [2021-06-05 04:55:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:03,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957013149] [2021-06-05 04:55:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:04,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957013149] [2021-06-05 04:55:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957013149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796801] [2021-06-05 04:55:04,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:04,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:55:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:05,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:05,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:05,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:05,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:05,195 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:05,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:05,206 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:05,212 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,217 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:05,222 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,227 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,231 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:05,236 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,240 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:05,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:05,245 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,249 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:05,253 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,378 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 04:55:05,379 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 04:55:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:05,383 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:05,386 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:05,390 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:05,394 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:05,397 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:05,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:05,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:05,449 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 04:55:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:05,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:05,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:05,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:05,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383993846] [2021-06-05 04:55:05,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:05,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:05,632 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:06,189 INFO L93 Difference]: Finished difference Result 186 states and 368 transitions. [2021-06-05 04:55:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:06,190 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:55:06,190 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:55:06,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:55:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:55:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2021-06-05 04:55:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1) internal successors, (294), 140 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 294 transitions. [2021-06-05 04:55:06,191 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 294 transitions. Word has length 20 [2021-06-05 04:55:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:06,191 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 294 transitions. [2021-06-05 04:55:06,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 294 transitions. [2021-06-05 04:55:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:06,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:06,191 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:06,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28492 [2021-06-05 04:55:06,392 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash 633496937, now seen corresponding path program 564 times [2021-06-05 04:55:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:06,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568670450] [2021-06-05 04:55:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:06,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:06,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568670450] [2021-06-05 04:55:06,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568670450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:06,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162717539] [2021-06-05 04:55:06,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:06,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:55:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:07,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:07,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:07,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:07,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:07,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:07,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:07,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:07,420 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,424 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:07,430 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,489 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:07,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:07,493 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:07,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:07,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:07,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:07,524 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:55:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162717539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:07,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115983442] [2021-06-05 04:55:07,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:07,632 INFO L87 Difference]: Start difference. First operand 141 states and 294 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:08,034 INFO L93 Difference]: Finished difference Result 166 states and 335 transitions. [2021-06-05 04:55:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:55:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:08,035 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:55:08,035 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:55:08,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:55:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-06-05 04:55:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 04:55:08,036 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 04:55:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:08,036 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 04:55:08,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 04:55:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:08,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:08,037 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:08,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,237 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1339426131, now seen corresponding path program 565 times [2021-06-05 04:55:08,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:08,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126584740] [2021-06-05 04:55:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:08,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126584740] [2021-06-05 04:55:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126584740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519574936] [2021-06-05 04:55:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:08,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:09,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:09,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:09,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:09,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,262 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:09,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:09,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:09,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:09,287 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:09,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:09,290 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,349 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:09,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:09,352 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:09,356 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:09,359 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:09,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:09,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:09,383 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:55:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519574936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:09,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:09,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530887435] [2021-06-05 04:55:09,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:09,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:09,493 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,869 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 04:55:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:09,958 INFO L93 Difference]: Finished difference Result 168 states and 344 transitions. [2021-06-05 04:55:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:09,958 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:55:09,958 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:55:09,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:55:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-06-05 04:55:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 04:55:09,960 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 04:55:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:09,960 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 04:55:09,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 04:55:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:09,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:09,960 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:10,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28852,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:10,161 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1818710807, now seen corresponding path program 566 times [2021-06-05 04:55:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:10,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343669725] [2021-06-05 04:55:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:10,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:10,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343669725] [2021-06-05 04:55:10,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343669725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:10,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525364277] [2021-06-05 04:55:10,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:10,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:10,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:11,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:11,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:11,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:11,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:11,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:11,496 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,507 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,516 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:11,522 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,526 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:11,532 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:11,536 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:11,541 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:11,546 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:11,550 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,686 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:55:11,687 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:55:11,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:11,691 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:11,695 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:11,699 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:11,703 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:11,707 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:11,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:11,766 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:55:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525364277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:11,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955427237] [2021-06-05 04:55:11,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:11,948 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:12,841 INFO L93 Difference]: Finished difference Result 234 states and 461 transitions. [2021-06-05 04:55:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:55:12,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:12,841 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:55:12,841 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:55:12,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1100.3ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:55:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:55:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2021-06-05 04:55:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.099290780141844) internal successors, (296), 141 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 296 transitions. [2021-06-05 04:55:12,843 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 296 transitions. Word has length 20 [2021-06-05 04:55:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:12,843 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 296 transitions. [2021-06-05 04:55:12,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 296 transitions. [2021-06-05 04:55:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:12,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:12,843 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:13,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29036,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:13,044 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -751680809, now seen corresponding path program 567 times [2021-06-05 04:55:13,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:13,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772372085] [2021-06-05 04:55:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772372085] [2021-06-05 04:55:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772372085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496575540] [2021-06-05 04:55:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:13,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:13,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:13,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:13,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:13,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:13,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:13,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:13,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:13,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:13,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:13,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:13,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:13,670 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:55:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496575540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:13,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:13,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513829611] [2021-06-05 04:55:13,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:13,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:13,744 INFO L87 Difference]: Start difference. First operand 142 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:13,947 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2021-06-05 04:55:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:55:13,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:13,948 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:55:13,948 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:55:13,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:55:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-06-05 04:55:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 04:55:13,949 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 04:55:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:13,949 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 04:55:13,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 04:55:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:13,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:13,950 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:14,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29167,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:14,150 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1230965485, now seen corresponding path program 568 times [2021-06-05 04:55:14,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:14,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944720079] [2021-06-05 04:55:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:14,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944720079] [2021-06-05 04:55:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944720079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033209620] [2021-06-05 04:55:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:14,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:14,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:14,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:14,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:14,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:14,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:14,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:14,695 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:14,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:14,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:14,764 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:14,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:14,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:14,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:14,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:14,820 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 04:55:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033209620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:14,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:14,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:14,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562101218] [2021-06-05 04:55:14,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:14,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:14,985 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:15,248 INFO L93 Difference]: Finished difference Result 159 states and 323 transitions. [2021-06-05 04:55:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:55:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:15,249 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:55:15,249 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:55:15,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:55:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-06-05 04:55:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 04:55:15,250 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 04:55:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:15,250 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 04:55:15,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 04:55:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:15,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:15,251 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:15,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29211 [2021-06-05 04:55:15,451 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1766195287, now seen corresponding path program 569 times [2021-06-05 04:55:15,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:15,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832699121] [2021-06-05 04:55:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832699121] [2021-06-05 04:55:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832699121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962151356] [2021-06-05 04:55:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:15,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:55:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:16,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:16,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:16,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:16,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:16,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:16,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:16,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:16,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:16,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:16,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:16,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:16,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:16,135 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:55:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962151356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:16,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:16,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308264348] [2021-06-05 04:55:16,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:16,268 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:17,208 INFO L93 Difference]: Finished difference Result 201 states and 403 transitions. [2021-06-05 04:55:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:55:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:17,208 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:55:17,208 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:55:17,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:55:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:55:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2021-06-05 04:55:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1041666666666665) internal successors, (303), 144 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 303 transitions. [2021-06-05 04:55:17,210 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 303 transitions. Word has length 20 [2021-06-05 04:55:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:17,210 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 303 transitions. [2021-06-05 04:55:17,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 303 transitions. [2021-06-05 04:55:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:17,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:17,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:17,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29248,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,411 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1478931693, now seen corresponding path program 570 times [2021-06-05 04:55:17,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:17,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807696678] [2021-06-05 04:55:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:17,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807696678] [2021-06-05 04:55:17,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807696678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061250301] [2021-06-05 04:55:17,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:55:17,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:18,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:18,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:18,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:18,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:18,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,362 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:18,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:18,371 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,375 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:18,378 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,437 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:18,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:18,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:18,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:18,446 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:18,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:18,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:18,472 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:55:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:18,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061250301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:18,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:18,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:18,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088261008] [2021-06-05 04:55:18,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:18,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:18,579 INFO L87 Difference]: Start difference. First operand 145 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:18,973 INFO L93 Difference]: Finished difference Result 176 states and 361 transitions. [2021-06-05 04:55:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:55:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:18,973 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:55:18,973 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:55:18,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:55:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-06-05 04:55:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1020408163265305) internal successors, (309), 147 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 309 transitions. [2021-06-05 04:55:18,975 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 309 transitions. Word has length 20 [2021-06-05 04:55:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:18,975 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 309 transitions. [2021-06-05 04:55:18,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 309 transitions. [2021-06-05 04:55:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:18,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:18,975 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:19,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29274 [2021-06-05 04:55:19,176 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 843112535, now seen corresponding path program 571 times [2021-06-05 04:55:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:19,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20210185] [2021-06-05 04:55:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:19,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20210185] [2021-06-05 04:55:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20210185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923043614] [2021-06-05 04:55:19,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:20,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:20,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:20,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:20,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:20,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:20,204 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,208 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:20,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:20,212 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:20,216 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,274 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:20,278 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:20,281 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:20,284 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:20,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:20,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:20,309 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:55:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923043614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409711064] [2021-06-05 04:55:20,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:20,416 INFO L87 Difference]: Start difference. First operand 148 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:20,789 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-06-05 04:55:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:55:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:20,790 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:55:20,790 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:55:20,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:55:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-06-05 04:55:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-06-05 04:55:20,791 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-06-05 04:55:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:20,791 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-06-05 04:55:20,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-06-05 04:55:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:20,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:20,792 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:20,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29391 [2021-06-05 04:55:20,992 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 363827859, now seen corresponding path program 572 times [2021-06-05 04:55:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:20,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693331571] [2021-06-05 04:55:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:21,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693331571] [2021-06-05 04:55:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693331571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773128649] [2021-06-05 04:55:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:21,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:21,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:22,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:22,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:22,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:22,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:22,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:22,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:22,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:22,285 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,290 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,294 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,299 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:22,304 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:22,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:22,309 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,313 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,317 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:22,320 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,465 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 04:55:22,466 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-06-05 04:55:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:22,470 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:22,473 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:22,477 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:22,480 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:22,484 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:22,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:22,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:22,541 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:117 [2021-06-05 04:55:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773128649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:22,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:22,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460036674] [2021-06-05 04:55:22,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:22,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:22,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:22,743 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:23,266 INFO L93 Difference]: Finished difference Result 172 states and 353 transitions. [2021-06-05 04:55:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:23,267 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:55:23,267 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:55:23,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 733.3ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:55:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-06-05 04:55:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1020408163265305) internal successors, (309), 147 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 309 transitions. [2021-06-05 04:55:23,268 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 309 transitions. Word has length 20 [2021-06-05 04:55:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:23,268 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 309 transitions. [2021-06-05 04:55:23,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 309 transitions. [2021-06-05 04:55:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:23,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:23,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:23,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29562,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:23,469 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1430857857, now seen corresponding path program 573 times [2021-06-05 04:55:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:23,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208604912] [2021-06-05 04:55:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:23,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208604912] [2021-06-05 04:55:23,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208604912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197781344] [2021-06-05 04:55:23,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:23,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:23,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:23,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:23,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:23,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:23,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:24,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:24,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:24,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:24,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:24,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:24,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:24,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:24,044 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:55:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197781344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:24,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:24,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782064903] [2021-06-05 04:55:24,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:24,116 INFO L87 Difference]: Start difference. First operand 148 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:24,363 INFO L93 Difference]: Finished difference Result 170 states and 345 transitions. [2021-06-05 04:55:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:55:24,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:24,363 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:55:24,363 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:55:24,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:55:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2021-06-05 04:55:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-05 04:55:24,365 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 20 [2021-06-05 04:55:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-05 04:55:24,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-05 04:55:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:24,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:24,365 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:24,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29863,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,565 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash 951573181, now seen corresponding path program 574 times [2021-06-05 04:55:24,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:24,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23183388] [2021-06-05 04:55:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:24,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23183388] [2021-06-05 04:55:24,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23183388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498133440] [2021-06-05 04:55:24,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:25,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:25,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:25,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:25,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:25,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:25,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:25,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:25,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:25,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:25,160 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:25,163 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:25,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:25,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:25,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:25,214 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:55:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498133440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:25,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:25,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242889149] [2021-06-05 04:55:25,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:25,377 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:25,775 INFO L93 Difference]: Finished difference Result 173 states and 355 transitions. [2021-06-05 04:55:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:25,775 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:55:25,775 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:55:25,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:55:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:55:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2021-06-05 04:55:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-06-05 04:55:25,777 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-06-05 04:55:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:25,777 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-06-05 04:55:25,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-06-05 04:55:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:25,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:25,777 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:25,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29885,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:25,978 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash 416343379, now seen corresponding path program 575 times [2021-06-05 04:55:25,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:25,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953464825] [2021-06-05 04:55:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:26,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953464825] [2021-06-05 04:55:26,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953464825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709819614] [2021-06-05 04:55:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:26,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:55:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:26,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:26,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:26,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:26,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:26,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:26,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:26,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:26,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:26,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:26,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:26,564 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:26,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:26,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:26,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:26,614 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:55:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709819614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:26,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469989853] [2021-06-05 04:55:26,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:26,789 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:27,584 INFO L93 Difference]: Finished difference Result 225 states and 444 transitions. [2021-06-05 04:55:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:55:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:27,585 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:55:27,585 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:55:27,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 974.6ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:55:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:55:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2021-06-05 04:55:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.119205298013245) internal successors, (320), 151 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 320 transitions. [2021-06-05 04:55:27,587 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 320 transitions. Word has length 20 [2021-06-05 04:55:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 320 transitions. [2021-06-05 04:55:27,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 320 transitions. [2021-06-05 04:55:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:27,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:27,587 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:27,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29920,576 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:27,787 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1823873641, now seen corresponding path program 576 times [2021-06-05 04:55:27,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:27,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164205236] [2021-06-05 04:55:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164205236] [2021-06-05 04:55:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164205236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568691549] [2021-06-05 04:55:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:28,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:55:28,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:28,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:28,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:28,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:28,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:28,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:28,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:28,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:28,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:28,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:28,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:28,332 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:55:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:28,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568691549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:28,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:28,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676806883] [2021-06-05 04:55:28,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:28,408 INFO L87 Difference]: Start difference. First operand 152 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:28,757 INFO L93 Difference]: Finished difference Result 179 states and 370 transitions. [2021-06-05 04:55:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:28,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:28,757 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:55:28,757 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:55:28,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:55:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:55:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-06-05 04:55:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.116883116883117) internal successors, (326), 154 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 326 transitions. [2021-06-05 04:55:28,759 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 326 transitions. Word has length 20 [2021-06-05 04:55:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:28,759 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 326 transitions. [2021-06-05 04:55:28,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 326 transitions. [2021-06-05 04:55:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:28,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:28,759 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:28,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29944 [2021-06-05 04:55:28,961 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1991808979, now seen corresponding path program 577 times [2021-06-05 04:55:28,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:28,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858401735] [2021-06-05 04:55:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858401735] [2021-06-05 04:55:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858401735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187238484] [2021-06-05 04:55:29,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:29,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:29,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:29,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:29,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:29,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:29,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:29,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:29,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:29,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:29,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:29,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:29,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:29,569 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:55:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187238484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:29,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:29,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126018572] [2021-06-05 04:55:29,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:29,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:29,696 INFO L87 Difference]: Start difference. First operand 155 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:30,160 INFO L93 Difference]: Finished difference Result 178 states and 368 transitions. [2021-06-05 04:55:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:30,161 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:55:30,161 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:55:30,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:55:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:55:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2021-06-05 04:55:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1176470588235294) internal successors, (324), 153 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 324 transitions. [2021-06-05 04:55:30,163 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 324 transitions. Word has length 20 [2021-06-05 04:55:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:30,163 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 324 transitions. [2021-06-05 04:55:30,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 324 transitions. [2021-06-05 04:55:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:30,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:30,163 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:30,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29964,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:30,377 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1456579177, now seen corresponding path program 578 times [2021-06-05 04:55:30,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:30,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426425809] [2021-06-05 04:55:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:30,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:30,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426425809] [2021-06-05 04:55:30,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426425809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:30,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349294445] [2021-06-05 04:55:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:30,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:30,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:30,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:30,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:30,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:30,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:30,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:30,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:30,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:30,936 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:30,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:30,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:30,972 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:55:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349294445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:31,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512137479] [2021-06-05 04:55:31,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:31,108 INFO L87 Difference]: Start difference. First operand 154 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:31,917 INFO L93 Difference]: Finished difference Result 216 states and 437 transitions. [2021-06-05 04:55:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:55:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:31,918 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:55:31,918 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:55:31,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 909.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:55:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:55:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 153. [2021-06-05 04:55:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1184210526315788) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 322 transitions. [2021-06-05 04:55:31,919 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 322 transitions. Word has length 20 [2021-06-05 04:55:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:31,920 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 322 transitions. [2021-06-05 04:55:31,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 322 transitions. [2021-06-05 04:55:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:31,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:31,920 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:32,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29995,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,120 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2044324499, now seen corresponding path program 579 times [2021-06-05 04:55:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:32,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939888643] [2021-06-05 04:55:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:32,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:32,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939888643] [2021-06-05 04:55:32,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939888643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:32,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614066310] [2021-06-05 04:55:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:55:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:33,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:33,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:33,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,235 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:33,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,253 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:33,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:33,262 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:33,267 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:33,272 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:33,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:33,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:33,280 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,369 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:55:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:33,373 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:33,377 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:33,380 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:33,384 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:33,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:33,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:33,422 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:55:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614066310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:33,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:33,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232249932] [2021-06-05 04:55:33,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:33,555 INFO L87 Difference]: Start difference. First operand 153 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:33,912 INFO L93 Difference]: Finished difference Result 194 states and 397 transitions. [2021-06-05 04:55:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:55:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:33,913 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:55:33,913 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:55:33,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:55:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2021-06-05 04:55:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.129032258064516) internal successors, (330), 155 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 330 transitions. [2021-06-05 04:55:33,914 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 330 transitions. Word has length 20 [2021-06-05 04:55:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:33,914 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 330 transitions. [2021-06-05 04:55:33,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 330 transitions. [2021-06-05 04:55:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:33,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:33,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:34,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30022 [2021-06-05 04:55:34,115 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1100343233, now seen corresponding path program 580 times [2021-06-05 04:55:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:34,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534809901] [2021-06-05 04:55:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534809901] [2021-06-05 04:55:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534809901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841373161] [2021-06-05 04:55:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:34,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:35,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:35,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:55:35,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:35,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:35,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:35,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,119 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 04:55:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:35,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:35,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:35,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:35,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:35,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:35,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:35,181 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:55:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841373161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:35,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:35,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512646852] [2021-06-05 04:55:35,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:35,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:35,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:35,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:35,257 INFO L87 Difference]: Start difference. First operand 156 states and 330 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:35,608 INFO L93 Difference]: Finished difference Result 189 states and 385 transitions. [2021-06-05 04:55:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:55:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:35,608 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:55:35,608 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:55:35,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 612.8ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:55:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:55:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-06-05 04:55:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1257861635220126) internal successors, (338), 159 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 338 transitions. [2021-06-05 04:55:35,610 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 338 transitions. Word has length 20 [2021-06-05 04:55:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:35,610 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 338 transitions. [2021-06-05 04:55:35,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 338 transitions. [2021-06-05 04:55:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:35,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:35,610 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:35,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30269,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,811 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash -798147579, now seen corresponding path program 581 times [2021-06-05 04:55:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:35,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569426984] [2021-06-05 04:55:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569426984] [2021-06-05 04:55:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569426984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770560518] [2021-06-05 04:55:36,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:36,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:55:36,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:36,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:36,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:55:36,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:36,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:36,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:36,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:36,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,797 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-06-05 04:55:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:36,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:36,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:36,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:36,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:36,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:36,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:36,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:36,859 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:55:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770560518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:36,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:36,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826460399] [2021-06-05 04:55:36,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:36,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:36,938 INFO L87 Difference]: Start difference. First operand 160 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:37,372 INFO L93 Difference]: Finished difference Result 192 states and 392 transitions. [2021-06-05 04:55:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:55:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:37,373 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:55:37,373 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:55:37,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:55:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-06-05 04:55:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.125) internal successors, (340), 160 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 340 transitions. [2021-06-05 04:55:37,374 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 340 transitions. Word has length 20 [2021-06-05 04:55:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:37,374 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 340 transitions. [2021-06-05 04:55:37,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 340 transitions. [2021-06-05 04:55:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:37,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:37,375 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:37,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30367 [2021-06-05 04:55:37,575 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1829220543, now seen corresponding path program 582 times [2021-06-05 04:55:37,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:37,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735527218] [2021-06-05 04:55:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:37,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735527218] [2021-06-05 04:55:37,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735527218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119479372] [2021-06-05 04:55:37,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:37,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:55:37,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:38,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:38,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:38,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:38,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:38,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:38,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:38,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,495 INFO L628 ElimStorePlain]: treesize reduction 104, result has 37.3 percent of original size [2021-06-05 04:55:38,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:38,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:38,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:38,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:38,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:38,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:38,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:38,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:38,558 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:55:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119479372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:38,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945539603] [2021-06-05 04:55:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:38,634 INFO L87 Difference]: Start difference. First operand 161 states and 340 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:39,125 INFO L93 Difference]: Finished difference Result 189 states and 392 transitions. [2021-06-05 04:55:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:39,125 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:55:39,125 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:55:39,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:55:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:55:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-06-05 04:55:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.124223602484472) internal successors, (342), 161 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 342 transitions. [2021-06-05 04:55:39,127 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 342 transitions. Word has length 20 [2021-06-05 04:55:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:39,127 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 342 transitions. [2021-06-05 04:55:39,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 342 transitions. [2021-06-05 04:55:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:39,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:39,127 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:39,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30460 [2021-06-05 04:55:39,328 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 492823685, now seen corresponding path program 583 times [2021-06-05 04:55:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:39,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117742984] [2021-06-05 04:55:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:39,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:39,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117742984] [2021-06-05 04:55:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117742984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:39,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998087008] [2021-06-05 04:55:39,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 04:55:40,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:40,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:40,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:40,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:40,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,385 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 04:55:40,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:40,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:40,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:40,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:40,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:40,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:40,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:40,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:40,447 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 04:55:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998087008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:40,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141586739] [2021-06-05 04:55:40,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:40,530 INFO L87 Difference]: Start difference. First operand 162 states and 342 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,669 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-06-05 04:55:41,215 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:55:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:41,239 INFO L93 Difference]: Finished difference Result 195 states and 400 transitions. [2021-06-05 04:55:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:41,239 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:55:41,239 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:55:41,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1044.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:55:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:55:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2021-06-05 04:55:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 04:55:41,241 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 04:55:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:41,241 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 04:55:41,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 04:55:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:41,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:41,241 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:41,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30538,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,442 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash 13539009, now seen corresponding path program 584 times [2021-06-05 04:55:41,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:41,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351819638] [2021-06-05 04:55:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:41,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351819638] [2021-06-05 04:55:41,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351819638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309630482] [2021-06-05 04:55:41,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:41,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:42,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:42,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:42,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:42,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:42,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:42,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:42,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:42,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:42,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,706 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-06-05 04:55:42,707 INFO L628 ElimStorePlain]: treesize reduction 490, result has 19.3 percent of original size [2021-06-05 04:55:42,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:42,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:42,757 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:42,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:42,844 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:42,885 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:42,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:42,960 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:42,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:42,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:42,994 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 04:55:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309630482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:43,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:55:43,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772521800] [2021-06-05 04:55:43,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:55:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:55:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:43,132 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:43,582 INFO L93 Difference]: Finished difference Result 185 states and 384 transitions. [2021-06-05 04:55:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:55:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:43,582 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:55:43,582 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:55:43,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 746.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:55:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:55:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-06-05 04:55:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.125) internal successors, (340), 160 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 340 transitions. [2021-06-05 04:55:43,584 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 340 transitions. Word has length 20 [2021-06-05 04:55:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:43,584 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 340 transitions. [2021-06-05 04:55:43,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 340 transitions. [2021-06-05 04:55:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:43,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:43,584 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:43,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30684 [2021-06-05 04:55:43,785 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1384391087, now seen corresponding path program 585 times [2021-06-05 04:55:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:43,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619575760] [2021-06-05 04:55:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619575760] [2021-06-05 04:55:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619575760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27118296] [2021-06-05 04:55:43,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:44,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:55:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:44,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:44,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:44,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:44,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,777 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:44,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:44,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:44,794 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:44,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,802 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:44,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,855 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:55:44,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:44,858 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:44,861 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:44,864 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:44,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:44,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:44,886 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 04:55:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27118296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:44,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:44,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:44,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185487149] [2021-06-05 04:55:44,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:44,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:44,964 INFO L87 Difference]: Start difference. First operand 161 states and 340 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:45,382 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 04:55:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:55:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:45,383 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:55:45,383 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:55:45,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:55:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2021-06-05 04:55:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 04:55:45,384 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 04:55:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:45,384 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 04:55:45,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 04:55:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:45,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:45,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:45,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30793,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:45,585 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 353318123, now seen corresponding path program 586 times [2021-06-05 04:55:45,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:45,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367142946] [2021-06-05 04:55:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:45,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:45,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367142946] [2021-06-05 04:55:45,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367142946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:45,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592726256] [2021-06-05 04:55:45,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:45,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:46,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:46,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:46,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:46,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,646 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:46,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:46,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:46,661 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:46,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:46,665 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,716 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:55:46,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:46,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:46,722 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:46,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:46,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:46,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:46,753 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:55:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592726256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571254182] [2021-06-05 04:55:46,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:46,834 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,226 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:55:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:47,356 INFO L93 Difference]: Finished difference Result 191 states and 396 transitions. [2021-06-05 04:55:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:47,357 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:55:47,357 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:55:47,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:55:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 164. [2021-06-05 04:55:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-06-05 04:55:47,358 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 20 [2021-06-05 04:55:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:47,358 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-06-05 04:55:47,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-06-05 04:55:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:47,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:47,359 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:47,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30991 [2021-06-05 04:55:47,559 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1619604945, now seen corresponding path program 587 times [2021-06-05 04:55:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:47,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343637527] [2021-06-05 04:55:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:47,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343637527] [2021-06-05 04:55:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343637527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804816558] [2021-06-05 04:55:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:47,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:55:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:48,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:48,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:48,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:48,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:48,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:48,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,699 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:48,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:48,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,708 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:48,711 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,761 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:55:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:48,764 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:48,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:48,770 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:48,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:48,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:48,791 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:55:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:48,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804816558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:48,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:48,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826481995] [2021-06-05 04:55:48,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:48,869 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,318 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:55:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:49,427 INFO L93 Difference]: Finished difference Result 188 states and 390 transitions. [2021-06-05 04:55:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:55:49,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:49,428 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:55:49,428 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:55:49,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:55:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:55:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2021-06-05 04:55:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 04:55:49,429 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 04:55:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:49,429 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 04:55:49,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 04:55:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:49,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:49,429 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:49,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31175,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:49,630 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2098889621, now seen corresponding path program 588 times [2021-06-05 04:55:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:49,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468386139] [2021-06-05 04:55:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:49,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:49,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468386139] [2021-06-05 04:55:49,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468386139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396379979] [2021-06-05 04:55:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:49,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:55:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:50,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:55:50,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:50,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:50,980 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,990 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:50,995 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:51,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:51,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:51,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:51,015 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:51,019 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:51,023 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:51,029 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:51,033 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:51,037 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:51,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:51,041 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,166 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 04:55:51,167 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.7 percent of original size [2021-06-05 04:55:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:51,171 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:51,175 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:51,178 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:51,182 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:51,185 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:51,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:51,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:55:51,236 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:905, output treesize:104 [2021-06-05 04:55:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396379979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:51,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:55:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4109198] [2021-06-05 04:55:51,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:55:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:55:51,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:55:51,409 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,530 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-06-05 04:55:52,209 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 04:55:52,359 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 04:55:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:52,806 INFO L93 Difference]: Finished difference Result 281 states and 557 transitions. [2021-06-05 04:55:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:55:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:52,807 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:55:52,807 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 04:55:52,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:55:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 04:55:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2021-06-05 04:55:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.124223602484472) internal successors, (342), 161 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 342 transitions. [2021-06-05 04:55:52,809 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 342 transitions. Word has length 20 [2021-06-05 04:55:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:52,809 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 342 transitions. [2021-06-05 04:55:52,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 342 transitions. [2021-06-05 04:55:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:52,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:52,809 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:53,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31360,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,010 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1393553921, now seen corresponding path program 589 times [2021-06-05 04:55:53,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:53,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942694327] [2021-06-05 04:55:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:53,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942694327] [2021-06-05 04:55:53,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942694327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061922940] [2021-06-05 04:55:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:53,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:53,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:53,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:53,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:53,948 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:53,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:53,970 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:53,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:53,985 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:54,051 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:54,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:54,055 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:54,058 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:54,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:54,061 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:54,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:54,086 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:55:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061922940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624980748] [2021-06-05 04:55:54,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:54,195 INFO L87 Difference]: Start difference. First operand 162 states and 342 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:54,632 INFO L93 Difference]: Finished difference Result 191 states and 396 transitions. [2021-06-05 04:55:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:55:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:54,632 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:55:54,632 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:55:54,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:55:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:55:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 164. [2021-06-05 04:55:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-06-05 04:55:54,634 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 20 [2021-06-05 04:55:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:54,634 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-06-05 04:55:54,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-06-05 04:55:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:54,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:54,634 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:54,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31673 [2021-06-05 04:55:54,834 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -579369147, now seen corresponding path program 590 times [2021-06-05 04:55:54,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:54,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655703751] [2021-06-05 04:55:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:55,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655703751] [2021-06-05 04:55:55,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655703751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026769794] [2021-06-05 04:55:55,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:55,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:55,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:55,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:55:55,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:55,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:55,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:55,963 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:55,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,972 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:55,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,984 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:55,988 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:55,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:55,991 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:56,049 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:55:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:56,053 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:56,056 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:56,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:56,059 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:56,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:56,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:56,084 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:55:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026769794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:56,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657988694] [2021-06-05 04:55:56,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:56,194 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,508 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 04:55:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:56,539 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-05 04:55:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:55:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:56,539 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:55:56,539 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:55:56,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:55:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:55:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-06-05 04:55:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 04:55:56,541 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 04:55:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:56,541 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 04:55:56,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 04:55:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:56,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:56,541 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:56,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31814,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:56,742 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1058653823, now seen corresponding path program 591 times [2021-06-05 04:55:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:56,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456719577] [2021-06-05 04:55:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456719577] [2021-06-05 04:55:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456719577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092657101] [2021-06-05 04:55:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:57,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:57,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:57,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:57,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:55:57,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:55:57,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:57,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:55:57,817 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,821 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:55:57,826 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:55:57,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:55:57,835 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,843 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:55:57,847 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,946 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 04:55:57,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:57,950 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:55:57,953 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:57,957 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:57,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:57,960 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:58,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:58,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:55:58,004 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 04:55:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092657101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:58,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:55:58,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156441146] [2021-06-05 04:55:58,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:55:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:55:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:58,159 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:59,178 INFO L93 Difference]: Finished difference Result 255 states and 509 transitions. [2021-06-05 04:55:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:55:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:55:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:59,179 INFO L225 Difference]: With dead ends: 255 [2021-06-05 04:55:59,179 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 04:55:59,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1166.4ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:55:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 04:55:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 163. [2021-06-05 04:55:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 04:55:59,181 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 04:55:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:59,181 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 04:55:59,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 04:55:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:55:59,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:59,181 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:59,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31916 [2021-06-05 04:55:59,381 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash 8376175, now seen corresponding path program 592 times [2021-06-05 04:55:59,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:59,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397513650] [2021-06-05 04:55:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397513650] [2021-06-05 04:55:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397513650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569693429] [2021-06-05 04:55:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:55:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:59,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:59,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:59,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:55:59,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:55:59,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:55:59,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:55:59,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:55:59,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:55:59,923 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:55:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569693429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:59,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:55:59,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365873977] [2021-06-05 04:55:59,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:55:59,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:59,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:55:59,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:59,997 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,268 INFO L93 Difference]: Finished difference Result 185 states and 380 transitions. [2021-06-05 04:56:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:56:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,268 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:56:00,268 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:56:00,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:56:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-06-05 04:56:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 04:56:00,270 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 04:56:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,270 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 04:56:00,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 04:56:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:00,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,271 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32097,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,494 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash -470908501, now seen corresponding path program 593 times [2021-06-05 04:56:00,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789677179] [2021-06-05 04:56:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789677179] [2021-06-05 04:56:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789677179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999741190] [2021-06-05 04:56:00,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:00,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:01,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:01,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:01,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:01,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:01,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:01,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:01,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:01,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:01,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:01,067 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:01,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:01,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:01,105 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:56:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999741190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:01,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389823314] [2021-06-05 04:56:01,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:01,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:01,238 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:01,846 INFO L93 Difference]: Finished difference Result 228 states and 459 transitions. [2021-06-05 04:56:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:56:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:01,847 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:56:01,847 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:56:01,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:56:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 166. [2021-06-05 04:56:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-05 04:56:01,849 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 20 [2021-06-05 04:56:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-05 04:56:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-05 04:56:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:01,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:01,849 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:02,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32116 [2021-06-05 04:56:02,049 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1006138303, now seen corresponding path program 594 times [2021-06-05 04:56:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047576767] [2021-06-05 04:56:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:02,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047576767] [2021-06-05 04:56:02,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047576767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372226844] [2021-06-05 04:56:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:02,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:56:02,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:02,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:02,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:02,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:02,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:02,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:02,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:02,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:02,618 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:02,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:02,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:02,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:02,659 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:56:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372226844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:02,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:02,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590554867] [2021-06-05 04:56:02,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:02,790 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:03,421 INFO L93 Difference]: Finished difference Result 195 states and 406 transitions. [2021-06-05 04:56:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:03,422 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:56:03,422 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:56:03,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:56:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:56:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2021-06-05 04:56:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-05 04:56:03,423 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 20 [2021-06-05 04:56:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:03,424 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-05 04:56:03,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-05 04:56:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:03,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:03,424 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32148 [2021-06-05 04:56:03,624 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash 323612997, now seen corresponding path program 595 times [2021-06-05 04:56:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692883475] [2021-06-05 04:56:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:03,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692883475] [2021-06-05 04:56:03,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692883475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771968861] [2021-06-05 04:56:03,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:04,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,648 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:04,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:04,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:04,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:04,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:04,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:04,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:04,681 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,731 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:04,735 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:04,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:04,741 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:04,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:04,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:04,762 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771968861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:04,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:04,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453567905] [2021-06-05 04:56:04,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:04,842 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,279 INFO L93 Difference]: Finished difference Result 200 states and 414 transitions. [2021-06-05 04:56:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:56:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,280 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:56:05,280 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:05,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2021-06-05 04:56:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 04:56:05,281 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 04:56:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,281 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 04:56:05,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 04:56:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:05,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,282 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32176 [2021-06-05 04:56:05,482 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash -707459967, now seen corresponding path program 596 times [2021-06-05 04:56:05,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395367987] [2021-06-05 04:56:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395367987] [2021-06-05 04:56:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395367987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844337656] [2021-06-05 04:56:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:05,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:05,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:06,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:06,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:06,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:06,532 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:06,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:06,550 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:06,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:06,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:06,560 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,625 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:06,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:06,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:06,633 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:06,637 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:06,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:06,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:06,659 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844337656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:06,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989007784] [2021-06-05 04:56:06,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:06,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:06,738 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,136 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:56:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:07,263 INFO L93 Difference]: Finished difference Result 197 states and 408 transitions. [2021-06-05 04:56:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:07,264 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:56:07,264 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:07,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-06-05 04:56:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 04:56:07,266 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 04:56:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:07,266 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 04:56:07,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 04:56:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:07,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:07,266 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:07,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32350 [2021-06-05 04:56:07,466 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:07,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1614584261, now seen corresponding path program 597 times [2021-06-05 04:56:07,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:07,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128468709] [2021-06-05 04:56:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:07,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128468709] [2021-06-05 04:56:07,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128468709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654493484] [2021-06-05 04:56:07,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:07,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:08,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:08,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:08,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:08,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:08,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:08,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,558 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:08,563 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:08,566 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,617 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:08,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:08,621 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:08,623 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:08,626 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:08,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:08,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:08,648 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654493484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:08,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:08,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428500161] [2021-06-05 04:56:08,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:08,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:08,726 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,129 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 04:56:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,221 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 04:56:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:56:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,221 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:56:09,221 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:09,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2021-06-05 04:56:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 04:56:09,223 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 04:56:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,223 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 04:56:09,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 04:56:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:09,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,223 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32534,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,424 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1135299585, now seen corresponding path program 598 times [2021-06-05 04:56:09,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485058105] [2021-06-05 04:56:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485058105] [2021-06-05 04:56:09,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485058105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921100522] [2021-06-05 04:56:09,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:09,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:09,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:10,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:10,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:10,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:10,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:10,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,726 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:10,735 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,739 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:10,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:10,749 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,753 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:10,756 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:10,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,853 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:56:10,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:10,858 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:10,861 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:10,864 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:10,868 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:10,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:10,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:10,906 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:56:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921100522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:11,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702011427] [2021-06-05 04:56:11,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:11,045 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:11,452 INFO L93 Difference]: Finished difference Result 193 states and 400 transitions. [2021-06-05 04:56:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:11,452 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:56:11,452 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:11,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2021-06-05 04:56:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-06-05 04:56:11,454 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 20 [2021-06-05 04:56:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:11,454 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-06-05 04:56:11,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-06-05 04:56:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:11,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:11,454 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:11,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32714,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:11,655 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash 332775831, now seen corresponding path program 599 times [2021-06-05 04:56:11,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:11,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094864744] [2021-06-05 04:56:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:11,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094864744] [2021-06-05 04:56:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094864744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095208146] [2021-06-05 04:56:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:11,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:12,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:12,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:12,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,694 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:12,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:12,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,711 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:12,714 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:12,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:12,717 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:12,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:12,778 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:12,781 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:12,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:12,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:12,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:12,809 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:56:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095208146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:12,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:12,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858965810] [2021-06-05 04:56:12,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:12,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:12,917 INFO L87 Difference]: Start difference. First operand 168 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:13,363 INFO L93 Difference]: Finished difference Result 197 states and 408 transitions. [2021-06-05 04:56:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:13,364 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:56:13,364 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:13,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-06-05 04:56:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 04:56:13,365 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 04:56:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:13,365 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 04:56:13,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 04:56:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:13,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:13,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:13,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32882 [2021-06-05 04:56:13,566 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1640147237, now seen corresponding path program 600 times [2021-06-05 04:56:13,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:13,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683771349] [2021-06-05 04:56:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683771349] [2021-06-05 04:56:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683771349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172961585] [2021-06-05 04:56:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:13,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:13,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:14,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:14,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:14,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:14,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,593 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:14,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:14,612 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:14,620 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,624 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:14,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,686 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:14,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:14,689 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:14,692 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:14,696 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:14,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:14,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:14,721 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:56:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172961585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446291199] [2021-06-05 04:56:14,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:14,831 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:15,256 INFO L93 Difference]: Finished difference Result 196 states and 402 transitions. [2021-06-05 04:56:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:56:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:15,256 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:56:15,257 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:56:15,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:56:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2021-06-05 04:56:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 04:56:15,258 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 04:56:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:15,258 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 04:56:15,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 04:56:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:15,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:15,258 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:15,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33073,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,459 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2119431913, now seen corresponding path program 601 times [2021-06-05 04:56:15,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:15,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355643721] [2021-06-05 04:56:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:15,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355643721] [2021-06-05 04:56:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355643721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466076911] [2021-06-05 04:56:15,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:17,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:17,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:17,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:17,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:17,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:17,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:17,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,215 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,229 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,234 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,238 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:17,244 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:56:17,249 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,254 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:17,259 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:17,263 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,400 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:56:17,401 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:56:17,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:17,405 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:17,409 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:17,413 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:17,417 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:17,420 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:17,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:17,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:56:17,477 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:56:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466076911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642353593] [2021-06-05 04:56:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:17,686 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,083 INFO L93 Difference]: Finished difference Result 193 states and 400 transitions. [2021-06-05 04:56:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,084 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:56:18,084 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:18,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2021-06-05 04:56:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 04:56:18,086 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 04:56:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,086 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 04:56:18,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 04:56:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:18,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,086 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33251,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,286 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1052401915, now seen corresponding path program 602 times [2021-06-05 04:56:18,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421383251] [2021-06-05 04:56:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421383251] [2021-06-05 04:56:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421383251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493430589] [2021-06-05 04:56:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:18,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:18,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:18,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:18,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:18,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:18,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:18,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:18,826 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:18,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:18,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:18,847 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:56:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493430589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:18,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:18,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914114020] [2021-06-05 04:56:18,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:18,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:18,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:18,921 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,272 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 04:56:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:56:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,272 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:56:19,272 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:56:19,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:56:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2021-06-05 04:56:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 04:56:19,274 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 04:56:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,274 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 04:56:19,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 04:56:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:19,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,274 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33412 [2021-06-05 04:56:19,475 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1531686591, now seen corresponding path program 603 times [2021-06-05 04:56:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144029406] [2021-06-05 04:56:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144029406] [2021-06-05 04:56:19,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144029406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:19,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629462488] [2021-06-05 04:56:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:56:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:19,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:19,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:19,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:19,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:20,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:20,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:20,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:20,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:20,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:20,057 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:20,060 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:20,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:20,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:20,098 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:56:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629462488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:20,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:20,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:20,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036607333] [2021-06-05 04:56:20,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:20,235 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:20,758 INFO L93 Difference]: Finished difference Result 212 states and 426 transitions. [2021-06-05 04:56:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:20,758 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:56:20,758 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:56:20,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:56:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2021-06-05 04:56:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 04:56:20,760 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 04:56:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:20,760 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 04:56:20,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 04:56:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:20,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:20,761 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:20,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33430,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:20,961 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:20,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2066916393, now seen corresponding path program 604 times [2021-06-05 04:56:20,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:20,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170176153] [2021-06-05 04:56:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170176153] [2021-06-05 04:56:21,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170176153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370127411] [2021-06-05 04:56:21,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:21,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:21,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:21,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:21,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:21,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:21,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:21,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:21,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:21,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:21,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:21,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:21,584 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:56:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370127411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458586585] [2021-06-05 04:56:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:21,716 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,343 INFO L93 Difference]: Finished difference Result 199 states and 414 transitions. [2021-06-05 04:56:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,344 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:56:22,344 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:56:22,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:56:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:56:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-06-05 04:56:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 04:56:22,345 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 04:56:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,345 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 04:56:22,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 04:56:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:22,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,345 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33454 [2021-06-05 04:56:22,546 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1779652799, now seen corresponding path program 605 times [2021-06-05 04:56:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220853152] [2021-06-05 04:56:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:22,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220853152] [2021-06-05 04:56:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220853152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:22,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022925468] [2021-06-05 04:56:22,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:22,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:22,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:23,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:23,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:23,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:23,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:23,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:23,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:23,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,727 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:23,731 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,735 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:23,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,800 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:23,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:23,804 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:23,807 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:23,810 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:23,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:23,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:23,835 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:56:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022925468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:23,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:23,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525943767] [2021-06-05 04:56:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:23,943 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:24,355 INFO L93 Difference]: Finished difference Result 199 states and 412 transitions. [2021-06-05 04:56:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:24,356 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:56:24,356 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:56:24,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:56:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2021-06-05 04:56:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 04:56:24,358 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 04:56:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:24,358 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 04:56:24,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 04:56:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:24,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:24,359 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:24,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33489 [2021-06-05 04:56:24,573 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash 542391429, now seen corresponding path program 606 times [2021-06-05 04:56:24,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:24,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33219467] [2021-06-05 04:56:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33219467] [2021-06-05 04:56:24,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33219467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468487347] [2021-06-05 04:56:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:24,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:25,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:25,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:25,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:25,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:25,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:25,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,614 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:25,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:25,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,688 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:25,691 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:25,694 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:25,697 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:25,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:25,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:25,722 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:56:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468487347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:25,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604079031] [2021-06-05 04:56:25,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:25,804 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:26,215 INFO L93 Difference]: Finished difference Result 198 states and 406 transitions. [2021-06-05 04:56:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:56:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:26,216 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:56:26,216 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:56:26,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:56:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2021-06-05 04:56:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 04:56:26,217 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 04:56:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:26,217 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 04:56:26,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 04:56:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:26,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:26,218 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:26,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33642 [2021-06-05 04:56:26,418 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash 63106753, now seen corresponding path program 607 times [2021-06-05 04:56:26,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:26,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627160203] [2021-06-05 04:56:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627160203] [2021-06-05 04:56:26,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627160203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554662009] [2021-06-05 04:56:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:27,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:27,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:27,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:27,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:56:27,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:27,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:27,596 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:27,602 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:27,608 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,613 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:27,618 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,623 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,628 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,632 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:27,638 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,641 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:27,645 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,779 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:56:27,779 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:56:27,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:27,783 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:27,787 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:27,791 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:27,795 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:27,798 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:27,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:27,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:56:27,855 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:56:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554662009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:28,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:28,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115008917] [2021-06-05 04:56:28,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:28,074 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:29,048 INFO L93 Difference]: Finished difference Result 263 states and 525 transitions. [2021-06-05 04:56:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:56:29,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:29,049 INFO L225 Difference]: With dead ends: 263 [2021-06-05 04:56:29,049 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:56:29,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1179.2ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:56:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:56:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 171. [2021-06-05 04:56:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 04:56:29,051 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 04:56:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:29,051 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 04:56:29,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 04:56:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:29,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:29,052 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:29,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33811 [2021-06-05 04:56:29,257 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1130136751, now seen corresponding path program 608 times [2021-06-05 04:56:29,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:29,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359691109] [2021-06-05 04:56:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359691109] [2021-06-05 04:56:29,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359691109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983308781] [2021-06-05 04:56:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:29,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:29,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:29,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:29,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:29,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:29,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:29,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:29,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:29,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:29,839 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:56:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983308781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:29,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079833295] [2021-06-05 04:56:29,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:29,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:29,913 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:30,274 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 04:56:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:56:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:30,275 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:56:30,275 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:56:30,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:56:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2021-06-05 04:56:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 04:56:30,276 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 04:56:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:30,276 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 04:56:30,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 04:56:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:30,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:30,277 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34046 [2021-06-05 04:56:30,477 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash 650852075, now seen corresponding path program 609 times [2021-06-05 04:56:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990911159] [2021-06-05 04:56:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990911159] [2021-06-05 04:56:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990911159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93569659] [2021-06-05 04:56:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:56:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:31,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:31,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:31,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:31,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:31,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:31,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:31,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:31,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:31,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:31,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:31,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:31,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:31,116 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:56:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93569659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783631262] [2021-06-05 04:56:31,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:31,261 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:31,910 INFO L93 Difference]: Finished difference Result 236 states and 475 transitions. [2021-06-05 04:56:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:56:31,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:31,911 INFO L225 Difference]: With dead ends: 236 [2021-06-05 04:56:31,911 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:56:31,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:56:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2021-06-05 04:56:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 04:56:31,912 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 04:56:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:31,912 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 04:56:31,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 04:56:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:31,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:31,913 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:32,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34068,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:32,113 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 115622273, now seen corresponding path program 610 times [2021-06-05 04:56:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43705973] [2021-06-05 04:56:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:32,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43705973] [2021-06-05 04:56:32,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43705973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484263539] [2021-06-05 04:56:32,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:32,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:32,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:32,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:32,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:32,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:32,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,685 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:32,688 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:32,691 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:32,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:32,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:32,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:56:32,752 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:201, output treesize:121 [2021-06-05 04:56:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484263539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:32,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:32,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852266718] [2021-06-05 04:56:32,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:32,929 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:33,529 INFO L93 Difference]: Finished difference Result 201 states and 418 transitions. [2021-06-05 04:56:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:33,530 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:56:33,530 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:33,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:56:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-06-05 04:56:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 04:56:33,531 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 04:56:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:33,531 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 04:56:33,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 04:56:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:33,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:33,532 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:33,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34103 [2021-06-05 04:56:33,732 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2124594747, now seen corresponding path program 611 times [2021-06-05 04:56:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:33,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463712956] [2021-06-05 04:56:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463712956] [2021-06-05 04:56:33,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463712956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283954982] [2021-06-05 04:56:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:34,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:34,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:34,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:34,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:34,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:34,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:34,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:34,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:34,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:34,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:34,395 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:56:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283954982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:34,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:34,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135710999] [2021-06-05 04:56:34,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:34,471 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:34,821 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 04:56:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:56:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:34,822 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:56:34,822 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:56:34,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:56:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2021-06-05 04:56:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 04:56:34,823 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 04:56:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:34,823 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 04:56:34,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 04:56:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:34,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:34,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:35,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34130 [2021-06-05 04:56:35,024 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1691087873, now seen corresponding path program 612 times [2021-06-05 04:56:35,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:35,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197264864] [2021-06-05 04:56:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197264864] [2021-06-05 04:56:35,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197264864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610421695] [2021-06-05 04:56:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:35,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:35,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:35,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:35,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:35,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:35,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:35,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:35,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:35,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:35,687 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:35,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:35,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:35,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:35,728 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:56:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610421695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:35,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371152248] [2021-06-05 04:56:35,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:35,861 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:36,388 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-06-05 04:56:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:36,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:36,389 INFO L225 Difference]: With dead ends: 214 [2021-06-05 04:56:36,389 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:56:36,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 760.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:56:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 172. [2021-06-05 04:56:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 04:56:36,390 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 04:56:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:36,391 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 04:56:36,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 04:56:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:36,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:36,391 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:36,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34156 [2021-06-05 04:56:36,613 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:36,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1155858071, now seen corresponding path program 613 times [2021-06-05 04:56:36,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:36,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758031227] [2021-06-05 04:56:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758031227] [2021-06-05 04:56:36,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758031227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851797813] [2021-06-05 04:56:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:37,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:37,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:37,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:37,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,286 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 04:56:37,286 INFO L628 ElimStorePlain]: treesize reduction 30, result has 84.8 percent of original size [2021-06-05 04:56:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,290 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:37,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:37,297 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,300 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:37,303 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:37,307 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:37,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:37,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:56:37,366 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 04:56:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851797813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:37,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:37,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373977657] [2021-06-05 04:56:37,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:37,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:37,542 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:38,327 INFO L93 Difference]: Finished difference Result 246 states and 491 transitions. [2021-06-05 04:56:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:56:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:38,328 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:56:38,328 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:56:38,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 970.0ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:56:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:56:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-06-05 04:56:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 04:56:38,329 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 04:56:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:38,329 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 04:56:38,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 04:56:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:38,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:38,330 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:38,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34186,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,530 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1743603393, now seen corresponding path program 614 times [2021-06-05 04:56:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:38,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420577005] [2021-06-05 04:56:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:38,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420577005] [2021-06-05 04:56:38,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420577005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227886075] [2021-06-05 04:56:38,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:38,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:39,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:39,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:39,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:39,672 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:39,677 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:39,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,687 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,691 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,695 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:39,700 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:39,704 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:39,708 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,802 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:56:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:39,806 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:39,810 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:39,813 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:39,830 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:39,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:39,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:39,879 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:56:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:40,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227886075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:40,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:40,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345078711] [2021-06-05 04:56:40,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:40,061 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,278 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 04:56:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:41,014 INFO L93 Difference]: Finished difference Result 232 states and 471 transitions. [2021-06-05 04:56:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:56:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:41,014 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:56:41,014 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:56:41,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1141.0ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:56:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:56:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 173. [2021-06-05 04:56:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.122093023255814) internal successors, (365), 172 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 365 transitions. [2021-06-05 04:56:41,016 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 365 transitions. Word has length 20 [2021-06-05 04:56:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:41,016 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 365 transitions. [2021-06-05 04:56:41,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 365 transitions. [2021-06-05 04:56:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:41,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:41,016 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34211 [2021-06-05 04:56:41,217 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1799230575, now seen corresponding path program 615 times [2021-06-05 04:56:41,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11982638] [2021-06-05 04:56:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11982638] [2021-06-05 04:56:41,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11982638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243928821] [2021-06-05 04:56:41,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:41,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:42,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:42,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:42,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:42,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:42,141 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:42,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:42,149 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:42,153 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,204 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:42,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:42,207 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:42,210 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:42,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:42,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:42,235 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243928821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:42,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:42,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005290252] [2021-06-05 04:56:42,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:42,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:42,313 INFO L87 Difference]: Start difference. First operand 173 states and 365 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,653 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 04:56:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,797 INFO L93 Difference]: Finished difference Result 208 states and 431 transitions. [2021-06-05 04:56:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:56:42,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,798 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:56:42,798 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:42,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 700.3ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2021-06-05 04:56:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1193181818181817) internal successors, (373), 176 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 373 transitions. [2021-06-05 04:56:42,799 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 373 transitions. Word has length 20 [2021-06-05 04:56:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,799 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 373 transitions. [2021-06-05 04:56:42,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 373 transitions. [2021-06-05 04:56:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:42,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,800 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:43,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34483,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:43,000 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:43,000 INFO L82 PathProgramCache]: Analyzing trace with hash 768157611, now seen corresponding path program 616 times [2021-06-05 04:56:43,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:43,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975480884] [2021-06-05 04:56:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:43,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:43,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975480884] [2021-06-05 04:56:43,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975480884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:43,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521312058] [2021-06-05 04:56:43,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:43,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:44,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:44,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:44,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:44,045 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:44,059 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:44,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:44,066 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,117 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:44,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:44,121 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:44,124 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:44,127 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:44,148 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521312058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:44,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142206790] [2021-06-05 04:56:44,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:44,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:44,227 INFO L87 Difference]: Start difference. First operand 177 states and 373 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:44,602 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:56:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:44,717 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-06-05 04:56:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:44,718 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:56:44,718 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:44,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2021-06-05 04:56:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 04:56:44,719 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 04:56:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:44,720 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 04:56:44,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 04:56:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:44,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:44,720 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:44,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34587 [2021-06-05 04:56:44,920 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1204765457, now seen corresponding path program 617 times [2021-06-05 04:56:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:44,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550230991] [2021-06-05 04:56:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:45,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550230991] [2021-06-05 04:56:45,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550230991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:45,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998405502] [2021-06-05 04:56:45,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:45,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:45,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:46,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:46,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:46,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:46,042 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:46,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:46,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:46,061 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,112 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:56:46,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:46,115 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:46,118 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:46,121 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:46,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:46,142 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:56:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:46,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998405502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:46,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:46,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:46,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930885329] [2021-06-05 04:56:46,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:46,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:46,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:46,220 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:46,789 INFO L93 Difference]: Finished difference Result 208 states and 427 transitions. [2021-06-05 04:56:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:46,790 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:56:46,790 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:56:46,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 804.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:56:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 179. [2021-06-05 04:56:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 04:56:46,792 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 04:56:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:46,792 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 04:56:46,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 04:56:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:46,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:46,792 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:46,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34687,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:46,992 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1684050133, now seen corresponding path program 618 times [2021-06-05 04:56:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:46,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341574048] [2021-06-05 04:56:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:47,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:47,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341574048] [2021-06-05 04:56:47,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341574048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:47,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297397448] [2021-06-05 04:56:47,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:47,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:48,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:48,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:48,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:48,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:48,224 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:48,233 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,237 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:48,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:48,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,251 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:48,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:48,255 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:48,259 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,352 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:56:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:48,356 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:48,359 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:48,363 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:48,366 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:48,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:48,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:48,405 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:56:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:48,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297397448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:48,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:56:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227040496] [2021-06-05 04:56:48,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:48,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:48,543 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:48,980 INFO L93 Difference]: Finished difference Result 201 states and 417 transitions. [2021-06-05 04:56:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:56:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:48,980 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:56:48,980 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:48,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 668.0ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2021-06-05 04:56:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.12) internal successors, (371), 175 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 371 transitions. [2021-06-05 04:56:48,982 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 371 transitions. Word has length 20 [2021-06-05 04:56:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:48,982 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 371 transitions. [2021-06-05 04:56:48,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 371 transitions. [2021-06-05 04:56:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:48,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:48,982 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:49,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34870 [2021-06-05 04:56:49,183 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1808393409, now seen corresponding path program 619 times [2021-06-05 04:56:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521555678] [2021-06-05 04:56:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:49,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521555678] [2021-06-05 04:56:49,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521555678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215744485] [2021-06-05 04:56:49,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:50,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:50,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:50,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:50,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:50,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:50,518 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:50,522 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,526 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,530 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:50,534 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:50,538 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:50,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:50,541 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,599 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:50,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:50,603 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:50,606 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:50,609 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:50,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:50,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:50,634 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 4 variables, input treesize:787, output treesize:62 [2021-06-05 04:56:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215744485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:50,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:50,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835289034] [2021-06-05 04:56:50,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:50,740 INFO L87 Difference]: Start difference. First operand 176 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:51,124 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-06-05 04:56:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:56:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:51,125 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:56:51,125 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:51,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:56:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2021-06-05 04:56:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 04:56:51,126 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 04:56:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:51,126 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 04:56:51,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 04:56:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:51,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:51,127 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:51,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35109,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:51,327 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash -164529659, now seen corresponding path program 620 times [2021-06-05 04:56:51,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:51,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606228628] [2021-06-05 04:56:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:51,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606228628] [2021-06-05 04:56:51,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606228628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778197885] [2021-06-05 04:56:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:51,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:51,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:52,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:52,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:52,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:52,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:52,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:52,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:52,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,275 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:52,278 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,337 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:56:52,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:52,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:52,343 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:52,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:52,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:52,371 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:56:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:52,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778197885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:52,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:52,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000175536] [2021-06-05 04:56:52,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:52,479 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:52,903 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 04:56:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:52,934 INFO L93 Difference]: Finished difference Result 204 states and 419 transitions. [2021-06-05 04:56:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:56:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:52,935 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:56:52,935 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:56:52,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:56:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2021-06-05 04:56:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 04:56:52,937 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 04:56:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 04:56:52,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 04:56:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:52,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:52,937 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:53,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35252,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:53,138 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash -643814335, now seen corresponding path program 621 times [2021-06-05 04:56:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:53,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199306791] [2021-06-05 04:56:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:53,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:53,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199306791] [2021-06-05 04:56:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199306791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:53,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175537937] [2021-06-05 04:56:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:53,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:56:53,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:54,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:54,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:54,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:56:54,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:56:54,834 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,839 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:54,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:56:54,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,856 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,865 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:54,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:56:54,876 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,881 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:56:54,886 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,890 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:54,894 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:56:54,898 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,035 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 04:56:55,035 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:56:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:55,039 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:55,043 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:55,047 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:55,051 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:55,054 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:55,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:55,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:56:55,111 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:56:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175537937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:55,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:56:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781611740] [2021-06-05 04:56:55,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:55,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:55,316 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:56,304 INFO L93 Difference]: Finished difference Result 269 states and 538 transitions. [2021-06-05 04:56:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:56:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:56,305 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:56:56,305 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 04:56:56,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:56:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 04:56:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 177. [2021-06-05 04:56:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1193181818181817) internal successors, (373), 176 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 373 transitions. [2021-06-05 04:56:56,306 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 373 transitions. Word has length 20 [2021-06-05 04:56:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:56,306 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 373 transitions. [2021-06-05 04:56:56,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 373 transitions. [2021-06-05 04:56:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:56,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:56,307 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:56,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35360,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:56,507 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash 423215663, now seen corresponding path program 622 times [2021-06-05 04:56:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:56,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557548808] [2021-06-05 04:56:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557548808] [2021-06-05 04:56:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557548808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785039641] [2021-06-05 04:56:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:56,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:57,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:57,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:57,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:57,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:57,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:57,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:57,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:57,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:56:57,124 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:56:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:57,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785039641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:57,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:57,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:57,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676385914] [2021-06-05 04:56:57,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:57,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:57,198 INFO L87 Difference]: Start difference. First operand 177 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:57,563 INFO L93 Difference]: Finished difference Result 202 states and 419 transitions. [2021-06-05 04:56:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:56:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:57,564 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:56:57,564 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:56:57,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 522.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:56:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-06-05 04:56:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 04:56:57,565 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 04:56:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 04:56:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 04:56:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:57,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:57,566 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:57,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35521 [2021-06-05 04:56:57,766 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -56069013, now seen corresponding path program 623 times [2021-06-05 04:56:57,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:57,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381878008] [2021-06-05 04:56:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:57,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381878008] [2021-06-05 04:56:57,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381878008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856363316] [2021-06-05 04:56:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:58,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:56:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:58,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:58,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:58,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:58,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:58,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:58,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:58,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:58,337 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:58,340 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:58,344 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:58,347 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:58,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:56:58,394 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:56:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:58,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856363316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:58,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:58,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:56:58,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655973985] [2021-06-05 04:56:58,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:56:58,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:58,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:56:58,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:56:58,559 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:59,153 INFO L93 Difference]: Finished difference Result 242 states and 488 transitions. [2021-06-05 04:56:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:56:59,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:59,153 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:56:59,153 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:56:59,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:56:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:56:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2021-06-05 04:56:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 04:56:59,155 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 04:56:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:59,155 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 04:56:59,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 04:56:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:59,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:59,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:59,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35557 [2021-06-05 04:56:59,356 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:59,356 INFO L82 PathProgramCache]: Analyzing trace with hash -591298815, now seen corresponding path program 624 times [2021-06-05 04:56:59,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:59,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786022423] [2021-06-05 04:56:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:59,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:59,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786022423] [2021-06-05 04:56:59,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786022423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:59,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791344855] [2021-06-05 04:56:59,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:59,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:59,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:56:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:59,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:59,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:59,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:59,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:59,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:59,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:59,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:59,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:56:59,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:59,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:56:59,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:00,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:00,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:00,013 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:57:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:00,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791344855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:00,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:00,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:00,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335931889] [2021-06-05 04:57:00,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:00,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:00,174 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:00,772 INFO L93 Difference]: Finished difference Result 254 states and 508 transitions. [2021-06-05 04:57:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:57:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:00,772 INFO L225 Difference]: With dead ends: 254 [2021-06-05 04:57:00,772 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:57:00,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:57:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:57:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-06-05 04:57:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 04:57:00,774 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 04:57:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:00,774 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 04:57:00,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 04:57:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:00,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:00,774 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:00,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35581,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:00,975 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -304035221, now seen corresponding path program 625 times [2021-06-05 04:57:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:00,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866813451] [2021-06-05 04:57:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:01,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:01,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866813451] [2021-06-05 04:57:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866813451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:01,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839095808] [2021-06-05 04:57:01,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:02,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:02,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:02,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:02,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:02,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:02,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:02,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,055 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,059 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,063 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,067 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,070 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:02,073 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,131 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:02,135 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:02,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:02,141 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:02,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:02,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:02,166 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:57:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:02,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839095808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:02,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:02,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133921940] [2021-06-05 04:57:02,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:02,274 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:02,731 INFO L93 Difference]: Finished difference Result 208 states and 431 transitions. [2021-06-05 04:57:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:57:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:02,732 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:57:02,732 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:57:02,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:57:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:57:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-06-05 04:57:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1166666666666667) internal successors, (381), 180 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 381 transitions. [2021-06-05 04:57:02,734 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 381 transitions. Word has length 20 [2021-06-05 04:57:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:02,734 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 381 transitions. [2021-06-05 04:57:02,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 381 transitions. [2021-06-05 04:57:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:02,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:02,734 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:02,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35606,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:02,934 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2018009007, now seen corresponding path program 626 times [2021-06-05 04:57:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:02,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366895355] [2021-06-05 04:57:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:03,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:03,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366895355] [2021-06-05 04:57:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366895355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:03,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751357680] [2021-06-05 04:57:03,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:03,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:03,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:03,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:03,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:03,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:03,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:03,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:03,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:03,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,986 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,989 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:03,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:03,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:04,051 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:04,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:04,054 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:04,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:04,057 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:04,060 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:04,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:04,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:04,085 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:57:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:04,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751357680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:04,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:04,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:04,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392503571] [2021-06-05 04:57:04,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:04,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:04,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:04,194 INFO L87 Difference]: Start difference. First operand 181 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:04,655 INFO L93 Difference]: Finished difference Result 207 states and 425 transitions. [2021-06-05 04:57:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:57:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:04,656 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:57:04,656 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:57:04,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:57:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2021-06-05 04:57:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 04:57:04,657 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 04:57:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:04,658 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 04:57:04,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 04:57:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:04,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:04,658 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:04,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35791,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:04,858 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:04,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1538724331, now seen corresponding path program 627 times [2021-06-05 04:57:04,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:04,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618944032] [2021-06-05 04:57:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:05,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618944032] [2021-06-05 04:57:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618944032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291676315] [2021-06-05 04:57:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:05,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:57:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:57:05,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:05,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:05,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,993 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:05,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:05,998 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:06,005 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:06,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:06,019 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:06,024 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:06,030 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:06,037 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:06,043 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:06,049 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:06,054 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:06,059 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:06,064 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,200 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:57:06,200 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:57:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:06,205 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:06,210 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:06,215 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:06,219 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:06,224 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:06,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:06,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:06,283 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:57:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291676315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:06,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:06,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694153750] [2021-06-05 04:57:06,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:06,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:06,496 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:06,882 INFO L93 Difference]: Finished difference Result 204 states and 423 transitions. [2021-06-05 04:57:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:57:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:06,883 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:57:06,883 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:57:06,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 712.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:57:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:57:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2021-06-05 04:57:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.11731843575419) internal successors, (379), 179 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 379 transitions. [2021-06-05 04:57:06,885 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 379 transitions. Word has length 20 [2021-06-05 04:57:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:06,885 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 379 transitions. [2021-06-05 04:57:06,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 379 transitions. [2021-06-05 04:57:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:06,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:06,885 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:07,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35937,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:07,086 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1689212967, now seen corresponding path program 628 times [2021-06-05 04:57:07,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:07,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348134156] [2021-06-05 04:57:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:07,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348134156] [2021-06-05 04:57:07,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348134156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:07,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772687227] [2021-06-05 04:57:07,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:07,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:07,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:07,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:07,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:07,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:07,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:07,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:07,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:07,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:07,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:07,679 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:57:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772687227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:07,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:07,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540116315] [2021-06-05 04:57:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:07,753 INFO L87 Difference]: Start difference. First operand 180 states and 379 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:07,995 INFO L93 Difference]: Finished difference Result 202 states and 415 transitions. [2021-06-05 04:57:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:57:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:07,996 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:57:07,996 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:57:07,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:57:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2021-06-05 04:57:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 04:57:07,997 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 04:57:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:07,997 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 04:57:07,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 04:57:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:07,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,998 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36046,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,198 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2126469653, now seen corresponding path program 629 times [2021-06-05 04:57:08,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525718657] [2021-06-05 04:57:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525718657] [2021-06-05 04:57:08,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525718657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069302364] [2021-06-05 04:57:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:57:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:08,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:08,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:08,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:08,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:08,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:08,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:08,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:08,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:08,851 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:08,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:08,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:08,861 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:08,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:08,907 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:57:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069302364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:09,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22138044] [2021-06-05 04:57:09,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:09,080 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,346 INFO L93 Difference]: Finished difference Result 197 states and 406 transitions. [2021-06-05 04:57:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:57:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,347 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:57:09,347 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:57:09,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:57:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-06-05 04:57:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1166666666666667) internal successors, (381), 180 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 381 transitions. [2021-06-05 04:57:09,348 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 381 transitions. Word has length 20 [2021-06-05 04:57:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,348 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 381 transitions. [2021-06-05 04:57:09,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 381 transitions. [2021-06-05 04:57:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:09,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,349 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36068,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:09,549 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1591239851, now seen corresponding path program 630 times [2021-06-05 04:57:09,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149024543] [2021-06-05 04:57:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149024543] [2021-06-05 04:57:09,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149024543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441508284] [2021-06-05 04:57:09,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:09,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:10,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:10,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:10,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:10,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:10,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:10,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:10,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:10,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:10,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:10,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:10,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:10,199 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:10,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:10,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:10,244 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:57:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441508284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:10,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:10,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:10,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586878116] [2021-06-05 04:57:10,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:10,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:10,410 INFO L87 Difference]: Start difference. First operand 181 states and 381 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:10,930 INFO L93 Difference]: Finished difference Result 210 states and 437 transitions. [2021-06-05 04:57:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:10,931 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:57:10,931 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:57:10,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:57:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2021-06-05 04:57:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.11731843575419) internal successors, (379), 179 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 379 transitions. [2021-06-05 04:57:10,933 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 379 transitions. Word has length 20 [2021-06-05 04:57:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:10,933 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 379 transitions. [2021-06-05 04:57:10,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 379 transitions. [2021-06-05 04:57:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:10,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:10,933 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:11,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36106 [2021-06-05 04:57:11,133 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -648977169, now seen corresponding path program 631 times [2021-06-05 04:57:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:11,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748000478] [2021-06-05 04:57:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:11,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748000478] [2021-06-05 04:57:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748000478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511886803] [2021-06-05 04:57:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:11,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:11,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:11,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:11,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:11,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:11,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:11,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:11,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:11,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:11,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:11,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 04:57:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511886803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:11,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:11,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132188614] [2021-06-05 04:57:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:11,815 INFO L87 Difference]: Start difference. First operand 180 states and 379 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:12,174 INFO L93 Difference]: Finished difference Result 206 states and 427 transitions. [2021-06-05 04:57:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:57:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:12,175 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:57:12,175 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:57:12,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:57:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:57:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2021-06-05 04:57:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1153846153846154) internal successors, (385), 182 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 385 transitions. [2021-06-05 04:57:12,177 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 385 transitions. Word has length 20 [2021-06-05 04:57:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:12,177 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 385 transitions. [2021-06-05 04:57:12,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 385 transitions. [2021-06-05 04:57:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:12,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:12,177 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:12,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36141,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:12,377 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1128261845, now seen corresponding path program 632 times [2021-06-05 04:57:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:12,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324644171] [2021-06-05 04:57:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:12,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324644171] [2021-06-05 04:57:12,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324644171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853926818] [2021-06-05 04:57:12,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:12,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:12,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:12,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:12,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:12,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:12,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:12,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:12,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:12,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:12,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:12,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:12,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:12,959 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:12,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:12,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:12,996 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:57:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:13,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853926818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:13,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:13,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:13,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294583664] [2021-06-05 04:57:13,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:13,125 INFO L87 Difference]: Start difference. First operand 183 states and 385 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:13,732 INFO L93 Difference]: Finished difference Result 246 states and 496 transitions. [2021-06-05 04:57:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:13,732 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:57:13,732 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:57:13,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:57:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2021-06-05 04:57:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 04:57:13,734 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 04:57:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:13,734 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 04:57:13,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 04:57:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:13,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:13,734 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:13,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36164 [2021-06-05 04:57:13,935 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1663491647, now seen corresponding path program 633 times [2021-06-05 04:57:13,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:13,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664133886] [2021-06-05 04:57:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:14,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664133886] [2021-06-05 04:57:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664133886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287102640] [2021-06-05 04:57:14,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:14,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:57:14,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:14,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:14,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:14,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:14,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:14,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:14,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:14,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:14,674 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:57:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287102640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510485193] [2021-06-05 04:57:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:14,810 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:15,592 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-06-05 04:57:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:15,592 INFO L225 Difference]: With dead ends: 238 [2021-06-05 04:57:15,592 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:57:15,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1002.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:57:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 182. [2021-06-05 04:57:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 04:57:15,595 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 04:57:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:15,595 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 04:57:15,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 04:57:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:15,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:15,595 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:15,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36194,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:15,801 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1075746325, now seen corresponding path program 634 times [2021-06-05 04:57:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:15,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571466337] [2021-06-05 04:57:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:15,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571466337] [2021-06-05 04:57:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571466337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163520038] [2021-06-05 04:57:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:16,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:16,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:16,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:16,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:16,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:16,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:16,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:16,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:16,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,970 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:16,977 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,986 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,991 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:16,995 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,089 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:57:17,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:17,094 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:17,098 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:17,102 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:17,106 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:17,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:17,146 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:57:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163520038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:17,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:17,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:17,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123224127] [2021-06-05 04:57:17,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:17,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:17,282 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:17,709 INFO L93 Difference]: Finished difference Result 223 states and 458 transitions. [2021-06-05 04:57:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:57:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:17,709 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:57:17,709 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:57:17,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:57:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2021-06-05 04:57:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 04:57:17,712 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 04:57:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 04:57:17,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 04:57:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:17,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:17,712 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:17,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36233,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:17,925 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1364813311, now seen corresponding path program 635 times [2021-06-05 04:57:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433442727] [2021-06-05 04:57:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:18,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:18,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433442727] [2021-06-05 04:57:18,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433442727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:18,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166597525] [2021-06-05 04:57:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:18,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:18,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:18,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:18,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:18,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:18,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:18,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:18,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,988 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:18,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,051 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:19,055 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:19,058 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:19,061 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:19,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:19,088 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:57:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:19,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166597525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:19,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:19,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:57:19,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832849536] [2021-06-05 04:57:19,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:19,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:19,209 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,560 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:57:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:19,675 INFO L93 Difference]: Finished difference Result 213 states and 441 transitions. [2021-06-05 04:57:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:57:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:19,676 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:57:19,676 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:57:19,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:57:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2021-06-05 04:57:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1135135135135137) internal successors, (391), 185 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 391 transitions. [2021-06-05 04:57:19,678 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 391 transitions. Word has length 20 [2021-06-05 04:57:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:19,678 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 391 transitions. [2021-06-05 04:57:19,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 391 transitions. [2021-06-05 04:57:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:19,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:19,678 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:19,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36357 [2021-06-05 04:57:19,878 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash 957230917, now seen corresponding path program 636 times [2021-06-05 04:57:19,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:19,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163245144] [2021-06-05 04:57:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:20,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:20,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163245144] [2021-06-05 04:57:20,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163245144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:20,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416186646] [2021-06-05 04:57:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:20,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:21,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:21,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:21,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:21,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:21,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,044 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:21,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:21,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:21,052 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,111 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:21,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:21,115 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:21,119 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:21,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:21,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:21,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:21,148 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 04:57:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416186646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:21,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101032668] [2021-06-05 04:57:21,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:21,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:21,230 INFO L87 Difference]: Start difference. First operand 186 states and 391 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:21,719 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 04:57:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:21,759 INFO L93 Difference]: Finished difference Result 212 states and 435 transitions. [2021-06-05 04:57:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:57:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:21,760 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:57:21,760 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:57:21,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:57:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2021-06-05 04:57:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.1129032258064515) internal successors, (393), 186 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 393 transitions. [2021-06-05 04:57:21,761 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 393 transitions. Word has length 20 [2021-06-05 04:57:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:21,761 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 393 transitions. [2021-06-05 04:57:21,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 393 transitions. [2021-06-05 04:57:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:21,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:21,762 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36500,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:21,962 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash 477946241, now seen corresponding path program 637 times [2021-06-05 04:57:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:21,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145571799] [2021-06-05 04:57:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:22,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145571799] [2021-06-05 04:57:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145571799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571859083] [2021-06-05 04:57:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:22,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:23,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:23,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:23,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:23,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:57:23,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:23,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,326 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,330 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:23,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:23,358 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:23,365 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:23,370 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,375 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:23,378 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,514 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:57:23,515 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:57:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:23,519 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:23,523 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:23,527 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:23,531 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:23,535 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:23,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:23,593 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:57:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571859083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:23,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49814542] [2021-06-05 04:57:23,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:23,801 INFO L87 Difference]: Start difference. First operand 187 states and 393 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:25,162 INFO L93 Difference]: Finished difference Result 313 states and 602 transitions. [2021-06-05 04:57:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:57:25,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:25,163 INFO L225 Difference]: With dead ends: 313 [2021-06-05 04:57:25,163 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 04:57:25,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1584.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:57:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 04:57:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 190. [2021-06-05 04:57:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.132275132275132) internal successors, (403), 189 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 403 transitions. [2021-06-05 04:57:25,164 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 403 transitions. Word has length 20 [2021-06-05 04:57:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:25,164 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 403 transitions. [2021-06-05 04:57:25,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 403 transitions. [2021-06-05 04:57:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:25,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:25,165 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:25,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36604 [2021-06-05 04:57:25,365 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1544976239, now seen corresponding path program 638 times [2021-06-05 04:57:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073366693] [2021-06-05 04:57:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:25,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073366693] [2021-06-05 04:57:25,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073366693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115232076] [2021-06-05 04:57:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:25,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:25,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:25,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:25,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:25,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:25,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:25,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:25,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:25,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:25,999 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:57:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115232076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:26,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:26,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945903848] [2021-06-05 04:57:26,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:26,074 INFO L87 Difference]: Start difference. First operand 190 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:26,417 INFO L93 Difference]: Finished difference Result 215 states and 449 transitions. [2021-06-05 04:57:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:57:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:26,417 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:57:26,417 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:57:26,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:57:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:57:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-06-05 04:57:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.130890052356021) internal successors, (407), 191 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 407 transitions. [2021-06-05 04:57:26,419 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 407 transitions. Word has length 20 [2021-06-05 04:57:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:26,419 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 407 transitions. [2021-06-05 04:57:26,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 407 transitions. [2021-06-05 04:57:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:26,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:26,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:26,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36895,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:26,620 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1065691563, now seen corresponding path program 639 times [2021-06-05 04:57:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:26,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587041515] [2021-06-05 04:57:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587041515] [2021-06-05 04:57:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587041515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264581858] [2021-06-05 04:57:26,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:27,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:57:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:27,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:27,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:27,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:27,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:27,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:27,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:27,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:27,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:27,274 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:27,322 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 04:57:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264581858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:27,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:27,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434107120] [2021-06-05 04:57:27,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:27,497 INFO L87 Difference]: Start difference. First operand 192 states and 407 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:27,906 INFO L93 Difference]: Finished difference Result 233 states and 473 transitions. [2021-06-05 04:57:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:57:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:27,906 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:57:27,906 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:57:27,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:57:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-06-05 04:57:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1315789473684212) internal successors, (405), 190 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 405 transitions. [2021-06-05 04:57:27,908 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 405 transitions. Word has length 20 [2021-06-05 04:57:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:27,908 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 405 transitions. [2021-06-05 04:57:27,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 405 transitions. [2021-06-05 04:57:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:27,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:27,908 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:28,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36921 [2021-06-05 04:57:28,109 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 530461761, now seen corresponding path program 640 times [2021-06-05 04:57:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018319780] [2021-06-05 04:57:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:28,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018319780] [2021-06-05 04:57:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018319780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221458636] [2021-06-05 04:57:28,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:28,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:28,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:28,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:28,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:28,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:28,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:28,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:28,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:28,675 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:28,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:28,718 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:57:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:28,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221458636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:28,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:28,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151307546] [2021-06-05 04:57:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:28,848 INFO L87 Difference]: Start difference. First operand 191 states and 405 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:29,417 INFO L93 Difference]: Finished difference Result 220 states and 461 transitions. [2021-06-05 04:57:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:29,417 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:57:29,417 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:57:29,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:57:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2021-06-05 04:57:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.132275132275132) internal successors, (403), 189 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 403 transitions. [2021-06-05 04:57:29,419 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 403 transitions. Word has length 20 [2021-06-05 04:57:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:29,419 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 403 transitions. [2021-06-05 04:57:29,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 403 transitions. [2021-06-05 04:57:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:29,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:29,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36949 [2021-06-05 04:57:29,620 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1709755259, now seen corresponding path program 641 times [2021-06-05 04:57:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:29,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845335075] [2021-06-05 04:57:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:29,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845335075] [2021-06-05 04:57:29,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845335075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155579724] [2021-06-05 04:57:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:29,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:29,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:30,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:30,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:30,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:30,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:30,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:30,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:30,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:30,226 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:57:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155579724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:30,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:30,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448872768] [2021-06-05 04:57:30,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:30,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:30,299 INFO L87 Difference]: Start difference. First operand 190 states and 403 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:30,520 INFO L93 Difference]: Finished difference Result 213 states and 441 transitions. [2021-06-05 04:57:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:57:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:30,520 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:57:30,520 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:57:30,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:57:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2021-06-05 04:57:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1302083333333335) internal successors, (409), 192 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 409 transitions. [2021-06-05 04:57:30,522 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 409 transitions. Word has length 20 [2021-06-05 04:57:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:30,522 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 409 transitions. [2021-06-05 04:57:30,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 409 transitions. [2021-06-05 04:57:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:30,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:30,522 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:30,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36965,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:30,723 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2105927361, now seen corresponding path program 642 times [2021-06-05 04:57:30,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:30,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578106095] [2021-06-05 04:57:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578106095] [2021-06-05 04:57:30,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578106095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352635199] [2021-06-05 04:57:30,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:31,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:31,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:31,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:31,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:31,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:31,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:31,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,357 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:31,361 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:31,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:31,400 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 04:57:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:31,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352635199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:31,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380988367] [2021-06-05 04:57:31,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:31,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:31,531 INFO L87 Difference]: Start difference. First operand 193 states and 409 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:32,167 INFO L93 Difference]: Finished difference Result 256 states and 520 transitions. [2021-06-05 04:57:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:32,168 INFO L225 Difference]: With dead ends: 256 [2021-06-05 04:57:32,168 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:57:32,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 796.5ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:57:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 192. [2021-06-05 04:57:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.130890052356021) internal successors, (407), 191 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 407 transitions. [2021-06-05 04:57:32,170 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 407 transitions. Word has length 20 [2021-06-05 04:57:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:32,170 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 407 transitions. [2021-06-05 04:57:32,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 407 transitions. [2021-06-05 04:57:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:32,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:32,170 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:32,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36999 [2021-06-05 04:57:32,371 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1570697559, now seen corresponding path program 643 times [2021-06-05 04:57:32,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:32,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68852005] [2021-06-05 04:57:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:32,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68852005] [2021-06-05 04:57:32,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68852005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264869567] [2021-06-05 04:57:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:32,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:32,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:32,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:32,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:32,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:32,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:32,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:32,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:32,986 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:33,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:33,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:33,025 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 04:57:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:33,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264869567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:33,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:33,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:33,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711316459] [2021-06-05 04:57:33,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:33,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:33,156 INFO L87 Difference]: Start difference. First operand 192 states and 407 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:33,898 INFO L93 Difference]: Finished difference Result 248 states and 508 transitions. [2021-06-05 04:57:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:33,899 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:57:33,899 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:57:33,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:57:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-06-05 04:57:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1315789473684212) internal successors, (405), 190 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 405 transitions. [2021-06-05 04:57:33,900 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 405 transitions. Word has length 20 [2021-06-05 04:57:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:33,900 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 405 transitions. [2021-06-05 04:57:33,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 405 transitions. [2021-06-05 04:57:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:33,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:33,901 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:34,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37037,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:34,101 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2136524415, now seen corresponding path program 644 times [2021-06-05 04:57:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:34,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670675947] [2021-06-05 04:57:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:34,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670675947] [2021-06-05 04:57:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670675947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:34,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544855500] [2021-06-05 04:57:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:34,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:34,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:35,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:35,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:35,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:35,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:35,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:35,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:35,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,274 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:35,285 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,289 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,293 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,297 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,301 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:35,306 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:35,311 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:35,315 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:57:35,319 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,445 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 04:57:35,445 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 04:57:35,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:35,449 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:35,453 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:35,457 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:35,460 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:35,464 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:35,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:35,515 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:98 [2021-06-05 04:57:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544855500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:35,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:35,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134163666] [2021-06-05 04:57:35,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:35,679 INFO L87 Difference]: Start difference. First operand 191 states and 405 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:36,369 INFO L93 Difference]: Finished difference Result 229 states and 479 transitions. [2021-06-05 04:57:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:57:36,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:36,369 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:57:36,369 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 04:57:36,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 04:57:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-06-05 04:57:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.136125654450262) internal successors, (408), 191 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 408 transitions. [2021-06-05 04:57:36,371 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 408 transitions. Word has length 20 [2021-06-05 04:57:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:36,371 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 408 transitions. [2021-06-05 04:57:36,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 408 transitions. [2021-06-05 04:57:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:36,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:36,371 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:36,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37075 [2021-06-05 04:57:36,572 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash 472783407, now seen corresponding path program 645 times [2021-06-05 04:57:36,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:36,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423130306] [2021-06-05 04:57:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:36,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423130306] [2021-06-05 04:57:36,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423130306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577017164] [2021-06-05 04:57:36,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:37,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:37,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:37,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:37,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:37,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:37,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:37,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:37,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:37,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:37,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 04:57:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:37,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577017164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:37,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:37,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:37,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477678905] [2021-06-05 04:57:37,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:37,426 INFO L87 Difference]: Start difference. First operand 192 states and 408 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:38,033 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2021-06-05 04:57:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:57:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:38,034 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:57:38,034 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:57:38,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:57:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:57:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2021-06-05 04:57:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1333333333333333) internal successors, (416), 195 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 416 transitions. [2021-06-05 04:57:38,036 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 416 transitions. Word has length 20 [2021-06-05 04:57:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:38,036 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 416 transitions. [2021-06-05 04:57:38,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 416 transitions. [2021-06-05 04:57:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:38,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:38,037 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:38,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37308 [2021-06-05 04:57:38,237 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash -6501269, now seen corresponding path program 646 times [2021-06-05 04:57:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:38,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036320610] [2021-06-05 04:57:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036320610] [2021-06-05 04:57:38,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036320610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212705741] [2021-06-05 04:57:38,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:38,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:38,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:38,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:38,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:38,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:38,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:38,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:38,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:38,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:38,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:38,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:38,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:38,825 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:38,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:38,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:38,866 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:166, output treesize:79 [2021-06-05 04:57:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212705741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:38,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:38,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124324182] [2021-06-05 04:57:38,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:38,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:38,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:38,999 INFO L87 Difference]: Start difference. First operand 196 states and 416 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:39,990 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 04:57:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:40,125 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2021-06-05 04:57:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:57:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:40,125 INFO L225 Difference]: With dead ends: 284 [2021-06-05 04:57:40,125 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 04:57:40,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1160.4ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:57:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 04:57:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 197. [2021-06-05 04:57:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.13265306122449) internal successors, (418), 196 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 418 transitions. [2021-06-05 04:57:40,127 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 418 transitions. Word has length 20 [2021-06-05 04:57:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:40,127 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 418 transitions. [2021-06-05 04:57:40,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 418 transitions. [2021-06-05 04:57:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:40,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:40,127 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:40,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37332,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:40,328 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -541731071, now seen corresponding path program 647 times [2021-06-05 04:57:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:40,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377933495] [2021-06-05 04:57:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:40,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377933495] [2021-06-05 04:57:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377933495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170421940] [2021-06-05 04:57:40,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:40,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:57:40,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:40,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:40,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:40,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:40,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:40,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:40,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:40,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:40,902 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:40,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:40,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:40,942 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 04:57:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170421940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:41,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:57:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805368651] [2021-06-05 04:57:41,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:57:41,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:57:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:41,072 INFO L87 Difference]: Start difference. First operand 197 states and 418 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:41,405 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2021-06-05 04:57:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:57:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:41,405 INFO L225 Difference]: With dead ends: 235 [2021-06-05 04:57:41,405 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:57:41,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:57:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2021-06-05 04:57:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.13265306122449) internal successors, (418), 196 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 418 transitions. [2021-06-05 04:57:41,407 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 418 transitions. Word has length 20 [2021-06-05 04:57:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 418 transitions. [2021-06-05 04:57:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 418 transitions. [2021-06-05 04:57:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:41,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:41,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:41,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37358 [2021-06-05 04:57:41,608 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 46014251, now seen corresponding path program 648 times [2021-06-05 04:57:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:41,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930911182] [2021-06-05 04:57:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930911182] [2021-06-05 04:57:41,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930911182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339101982] [2021-06-05 04:57:41,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:41,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:41,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:42,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:42,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:42,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:42,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,786 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,790 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:42,804 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:42,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:42,813 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:42,818 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:42,821 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,914 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:57:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:42,918 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:42,922 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:42,925 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:42,928 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:42,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:42,967 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:57:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:43,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339101982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:43,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:43,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:57:43,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541858151] [2021-06-05 04:57:43,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:43,100 INFO L87 Difference]: Start difference. First operand 197 states and 418 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:44,118 INFO L93 Difference]: Finished difference Result 301 states and 602 transitions. [2021-06-05 04:57:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:44,119 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:57:44,119 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:57:44,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:57:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:57:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 201. [2021-06-05 04:57:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2021-06-05 04:57:44,121 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 20 [2021-06-05 04:57:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:44,121 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2021-06-05 04:57:44,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2021-06-05 04:57:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:44,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:44,121 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:44,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37379,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:44,322 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1086250049, now seen corresponding path program 649 times [2021-06-05 04:57:44,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:44,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112130960] [2021-06-05 04:57:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:44,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:44,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112130960] [2021-06-05 04:57:44,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112130960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:44,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996668016] [2021-06-05 04:57:44,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:44,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:57:45,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:45,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:45,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:45,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:45,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,444 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,449 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:45,455 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:45,462 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,467 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,472 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,476 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:45,482 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,486 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:45,492 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,496 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:45,500 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:45,504 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,642 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 04:57:45,643 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:57:45,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:45,647 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:45,651 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:45,655 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:45,658 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:45,662 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:45,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:45,722 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 04:57:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996668016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:45,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:45,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:57:45,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004891349] [2021-06-05 04:57:45,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:45,906 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:46,773 INFO L93 Difference]: Finished difference Result 238 states and 502 transitions. [2021-06-05 04:57:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:57:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:46,774 INFO L225 Difference]: With dead ends: 238 [2021-06-05 04:57:46,774 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 04:57:46,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1119.6ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:57:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 04:57:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-06-05 04:57:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.154228855721393) internal successors, (433), 201 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 433 transitions. [2021-06-05 04:57:46,776 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 433 transitions. Word has length 20 [2021-06-05 04:57:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:46,776 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 433 transitions. [2021-06-05 04:57:46,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 433 transitions. [2021-06-05 04:57:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:46,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:46,776 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:46,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37472 [2021-06-05 04:57:46,977 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash 367923539, now seen corresponding path program 650 times [2021-06-05 04:57:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:46,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640611543] [2021-06-05 04:57:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:47,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640611543] [2021-06-05 04:57:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640611543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366712622] [2021-06-05 04:57:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:48,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:48,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:48,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,251 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:48,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:48,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,265 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:48,270 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,274 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:48,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,285 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:48,289 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,348 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:48,351 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:48,354 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:48,357 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:48,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:48,382 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:705, output treesize:62 [2021-06-05 04:57:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:48,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366712622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:48,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:48,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:57:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659932756] [2021-06-05 04:57:48,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:48,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:48,501 INFO L87 Difference]: Start difference. First operand 202 states and 433 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:48,771 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 04:57:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:48,936 INFO L93 Difference]: Finished difference Result 240 states and 505 transitions. [2021-06-05 04:57:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:57:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:48,936 INFO L225 Difference]: With dead ends: 240 [2021-06-05 04:57:48,936 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:57:48,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 792.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:57:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:57:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2021-06-05 04:57:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1519607843137254) internal successors, (439), 204 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 439 transitions. [2021-06-05 04:57:48,938 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 439 transitions. Word has length 20 [2021-06-05 04:57:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:48,938 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 439 transitions. [2021-06-05 04:57:48,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 439 transitions. [2021-06-05 04:57:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:48,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:48,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:49,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37677 [2021-06-05 04:57:49,139 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1530567273, now seen corresponding path program 651 times [2021-06-05 04:57:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:49,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609847575] [2021-06-05 04:57:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609847575] [2021-06-05 04:57:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609847575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265310612] [2021-06-05 04:57:49,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:49,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:50,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:50,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:50,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:50,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,351 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:50,356 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:50,360 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:50,365 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:50,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,373 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:50,376 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,435 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:50,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:50,439 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:50,442 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:50,445 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:50,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:50,471 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:57:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:50,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265310612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:50,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:50,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:57:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600156165] [2021-06-05 04:57:50,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:50,586 INFO L87 Difference]: Start difference. First operand 205 states and 439 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:50,879 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 04:57:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:51,009 INFO L93 Difference]: Finished difference Result 237 states and 499 transitions. [2021-06-05 04:57:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:51,009 INFO L225 Difference]: With dead ends: 237 [2021-06-05 04:57:51,010 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:57:51,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:57:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:57:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2021-06-05 04:57:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 04:57:51,011 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 04:57:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:51,011 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 04:57:51,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 04:57:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:51,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:51,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:51,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37803 [2021-06-05 04:57:51,212 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1733327059, now seen corresponding path program 652 times [2021-06-05 04:57:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:51,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845537457] [2021-06-05 04:57:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:51,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845537457] [2021-06-05 04:57:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845537457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378341778] [2021-06-05 04:57:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:51,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:52,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:52,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:52,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:52,563 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,571 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:52,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,580 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:52,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,588 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:52,592 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:52,596 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,662 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:52,665 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:52,668 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:52,671 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:52,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:52,696 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:57:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:52,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378341778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:52,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:52,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:57:52,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944192862] [2021-06-05 04:57:52,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:52,809 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:53,246 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 04:57:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:57:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:53,247 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:57:53,247 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:57:53,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:57:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:57:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2021-06-05 04:57:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 04:57:53,249 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 04:57:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 04:57:53,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 04:57:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:53,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:53,249 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:53,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38032,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:53,450 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash -239596009, now seen corresponding path program 653 times [2021-06-05 04:57:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:53,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310495912] [2021-06-05 04:57:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:53,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:53,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310495912] [2021-06-05 04:57:53,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310495912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:53,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854148908] [2021-06-05 04:57:53,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:53,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:53,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:54,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:54,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:54,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:54,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:54,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:54,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,592 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:54,596 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,600 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,604 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:54,608 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,612 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:54,615 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,674 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 04:57:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:54,678 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:54,681 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:54,684 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:54,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:54,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:54,709 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 04:57:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854148908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:54,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:54,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:57:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921132765] [2021-06-05 04:57:54,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:54,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:54,825 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:55,194 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 04:57:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:55,288 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 04:57:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:57:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:55,288 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:57:55,288 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:57:55,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 783.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:57:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:57:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 04:57:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 04:57:55,290 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 04:57:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:55,290 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 04:57:55,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 04:57:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:55,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:55,291 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:55,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38201,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:55,491 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash -718880685, now seen corresponding path program 654 times [2021-06-05 04:57:55,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:55,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397506364] [2021-06-05 04:57:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:55,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397506364] [2021-06-05 04:57:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397506364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920113685] [2021-06-05 04:57:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:55,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:56,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:56,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:56,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:56,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:56,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:56,971 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:56,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:56,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:56,989 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:56,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:56,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:56,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:56,999 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 04:57:57,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:57,011 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:57,015 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 04:57:57,021 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:57,026 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:57,031 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:57,035 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:57,039 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:57,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:57,044 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:57,048 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,183 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 04:57:57,183 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 04:57:57,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:57,188 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:57,192 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:57,195 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:57,199 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:57,203 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:57,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:57:57,261 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 04:57:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:57,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920113685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:57,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:57,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:57:57,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637717650] [2021-06-05 04:57:57,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:57,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:57,475 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:57,958 INFO L93 Difference]: Finished difference Result 230 states and 485 transitions. [2021-06-05 04:57:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:57:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:57,958 INFO L225 Difference]: With dead ends: 230 [2021-06-05 04:57:57,958 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:57:57,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:57:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:57:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2021-06-05 04:57:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1527093596059115) internal successors, (437), 203 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 437 transitions. [2021-06-05 04:57:57,960 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 437 transitions. Word has length 20 [2021-06-05 04:57:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:57,960 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 437 transitions. [2021-06-05 04:57:57,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 437 transitions. [2021-06-05 04:57:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:57,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:57,961 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:58,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38358,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:58,161 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 651971393, now seen corresponding path program 655 times [2021-06-05 04:57:58,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:58,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023333616] [2021-06-05 04:57:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:58,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:58,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023333616] [2021-06-05 04:57:58,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023333616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:58,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22342336] [2021-06-05 04:57:58,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:57:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:57:59,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:59,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:59,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,158 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:59,162 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:57:59,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:57:59,171 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:57:59,174 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,226 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:57:59,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:57:59,230 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:59,233 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:57:59,236 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:59,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:59,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:59,257 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:57:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22342336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:59,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:59,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:57:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510232176] [2021-06-05 04:57:59,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:59,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:59,335 INFO L87 Difference]: Start difference. First operand 204 states and 437 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:59,703 INFO L93 Difference]: Finished difference Result 232 states and 483 transitions. [2021-06-05 04:57:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:57:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:59,703 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:57:59,703 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:57:59,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:57:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 206. [2021-06-05 04:57:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 04:57:59,705 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 04:57:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:59,705 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 04:57:59,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 04:57:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:59,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:59,706 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:59,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38657 [2021-06-05 04:57:59,906 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash -379101571, now seen corresponding path program 656 times [2021-06-05 04:57:59,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:59,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000380454] [2021-06-05 04:57:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000380454] [2021-06-05 04:58:00,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000380454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694904931] [2021-06-05 04:58:00,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:00,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:00,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:58:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:58:00,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:00,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:00,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:00,950 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,960 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:00,963 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:58:00,968 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:00,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:58:00,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,023 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:58:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:58:01,026 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:58:01,029 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:58:01,032 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:01,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:58:01,054 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:58:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694904931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:58:01,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123858747] [2021-06-05 04:58:01,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:58:01,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:58:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:58:01,133 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:01,611 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 04:58:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:58:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:01,611 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:58:01,611 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:58:01,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:58:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:58:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2021-06-05 04:58:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 04:58:01,613 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 04:58:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:01,613 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 04:58:01,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 04:58:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:01,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:01,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:01,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38745 [2021-06-05 04:58:01,814 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1942942657, now seen corresponding path program 657 times [2021-06-05 04:58:01,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:01,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279795656] [2021-06-05 04:58:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:02,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:02,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279795656] [2021-06-05 04:58:02,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279795656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:02,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876208932] [2021-06-05 04:58:02,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:02,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:02,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:58:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:02,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:58:02,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:02,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:02,822 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:58:02,827 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:58:02,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:02,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:02,839 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,890 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 04:58:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:58:02,893 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:58:02,896 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:58:02,899 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:02,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:58:02,920 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 04:58:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876208932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:03,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:03,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:58:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970733376] [2021-06-05 04:58:03,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:58:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:58:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:58:03,002 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:03,401 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 04:58:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:58:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:03,402 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:58:03,402 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:58:03,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 718.1ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:58:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:58:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 04:58:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 04:58:03,404 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 04:58:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:03,404 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 04:58:03,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 04:58:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:03,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:03,404 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:03,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38894,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:03,605 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1463657981, now seen corresponding path program 658 times [2021-06-05 04:58:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:03,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156959459] [2021-06-05 04:58:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:03,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:03,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156959459] [2021-06-05 04:58:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156959459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:03,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203431221] [2021-06-05 04:58:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:03,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:58:03,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:04,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:04,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:04,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:58:04,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 04:58:04,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,944 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:58:04,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:04,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 04:58:04,963 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 04:58:04,968 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,972 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:04,975 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,066 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:58:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:58:05,070 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:58:05,074 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:58:05,077 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:58:05,080 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:05,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:58:05,119 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 04:58:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:05,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203431221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:05,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:05,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 04:58:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930265485] [2021-06-05 04:58:05,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:58:05,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:58:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:58:05,261 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:05,393 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 04:58:06,093 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 04:58:06,259 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 04:58:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:06,707 INFO L93 Difference]: Finished difference Result 324 states and 654 transitions. [2021-06-05 04:58:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:58:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:06,707 INFO L225 Difference]: With dead ends: 324 [2021-06-05 04:58:06,707 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:58:06,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1643.7ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:58:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:58:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 205. [2021-06-05 04:58:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1519607843137254) internal successors, (439), 204 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 439 transitions. [2021-06-05 04:58:06,710 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 439 transitions. Word has length 20 [2021-06-05 04:58:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:06,710 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 439 transitions. [2021-06-05 04:58:06,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 439 transitions. [2021-06-05 04:58:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:06,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:06,710 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:06,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38977 [2021-06-05 04:58:06,911 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash 661134227, now seen corresponding path program 659 times [2021-06-05 04:58:06,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:06,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328813523] [2021-06-05 04:58:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-05 04:58:07,042 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-05 04:58:07,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39077 [2021-06-05 04:58:07,043 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:58:07,044 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:58:07,045 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:58:07,046 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:58:07 BasicIcfg [2021-06-05 04:58:07,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:58:07,046 INFO L168 Benchmark]: Toolchain (without parser) took 811569.80 ms. Allocated memory was 364.9 MB in the beginning and 956.3 MB in the end (delta: 591.4 MB). Free memory was 343.7 MB in the beginning and 751.9 MB in the end (delta: -408.2 MB). Peak memory consumption was 184.9 MB. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 364.9 MB. Free memory was 345.1 MB in the beginning and 345.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 364.9 MB. Free memory was 343.7 MB in the beginning and 342.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L168 Benchmark]: Boogie Preprocessor took 14.00 ms. Allocated memory is still 364.9 MB. Free memory was 342.2 MB in the beginning and 341.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L168 Benchmark]: RCFGBuilder took 473.03 ms. Allocated memory is still 364.9 MB. Free memory was 341.1 MB in the beginning and 339.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L168 Benchmark]: TraceAbstraction took 811045.56 ms. Allocated memory was 364.9 MB in the beginning and 956.3 MB in the end (delta: 591.4 MB). Free memory was 338.8 MB in the beginning and 751.9 MB in the end (delta: -413.1 MB). Peak memory consumption was 178.3 MB. Max. memory is 16.0 GB. [2021-06-05 04:58:07,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 364.9 MB. Free memory was 345.1 MB in the beginning and 345.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 364.9 MB. Free memory was 343.7 MB in the beginning and 342.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.00 ms. Allocated memory is still 364.9 MB. Free memory was 342.2 MB in the beginning and 341.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 473.03 ms. Allocated memory is still 364.9 MB. Free memory was 341.1 MB in the beginning and 339.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 811045.56 ms. Allocated memory was 364.9 MB in the beginning and 956.3 MB in the end (delta: 591.4 MB). Free memory was 338.8 MB in the beginning and 751.9 MB in the end (delta: -413.1 MB). Peak memory consumption was 178.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 3ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 3ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 810980.4ms, OverallIterations: 665, TraceHistogramMax: 4, EmptinessCheckTime: 177.3ms, AutomataDifference: 228590.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18816 SDtfs, 25328 SDslu, 126805 SDs, 0 SdLazy, 191488 SolverSat, 10521 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78591.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22674 GetRequests, 8027 SyntacticMatches, 1370 SemanticMatches, 13277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49179 ImplicationChecksByTransitivity, 296733.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=659, InterpolantAutomatonStates: 10003, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 977.3ms AutomataMinimizationTime, 664 MinimizatonAttempts, 19637 StatesRemovedByMinimization, 660 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2968.9ms SsaConstructionTime, 9587.4ms SatisfiabilityAnalysisTime, 385153.8ms InterpolantComputationTime, 24199 NumberOfCodeBlocks, 24199 NumberOfCodeBlocksAsserted, 2399 NumberOfCheckSat, 22877 ConstructedInterpolants, 1122 QuantifiedInterpolants, 383181 SizeOfPredicates, 3831 NumberOfNonLiveVariables, 59902 ConjunctsInSsa, 17037 ConjunctsInUnsatCore, 1322 InterpolantComputations, 6 PerfectInterpolantSequences, 2081/18224 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown